diff --git a/tir_sportif/22lr_risers/risers.3mf b/tir_sportif/22lr_risers/risers.3mf
new file mode 100644
index 0000000..0e61934
Binary files /dev/null and b/tir_sportif/22lr_risers/risers.3mf differ
diff --git a/tir_sportif/tripod/02_center_bottom.3mf b/tir_sportif/tripod/02_center_bottom.3mf
new file mode 100644
index 0000000..69f508e
Binary files /dev/null and b/tir_sportif/tripod/02_center_bottom.3mf differ
diff --git a/tir_sportif/tripod/scad/02_center_bottom.scad b/tir_sportif/tripod/scad/02_center_bottom.scad
index db1f5ab..18e4f06 100644
--- a/tir_sportif/tripod/scad/02_center_bottom.scad
+++ b/tir_sportif/tripod/scad/02_center_bottom.scad
@@ -1,41 +1,24 @@
 $fn = 60;
 
 include <BOSL2/std.scad>
-include <boltsos_0.4.1/BOLTS.scad>
+include <nutsnbolts/cyl_head_bolt.scad>;
 
-module legScrew() {
-    translate([-8,24.5,0]) {
-        cylinder(h=20, d=5.4, center=true);
-        translate ([0,0,-7.5]) DIN931("M5");
-        translate ([0,0,-9]) DIN931("M5");
-        cylinder(h=25, d=5, center=true);
-        translate([0,0,7.5]) cylinder(h=6, d=9);
-    }
+module screw(size) {
+    nutcatch_parallel(size, clh=0.2, clk=0.2);
+	translate([0,0,23]) hole_through(name=size, l=15, cld=0.2, h=8.5, hcld=0.4);
+	*nutcatch_sidecut(size, l=20, clk=0.1, clh=0.1, clsl=0.1);
 }
 
 difference() {
     // Center part
-    linear_extrude(height = 16)
+    translate([0,0,-8]) linear_extrude(height = 16)
             import("../svg/center_bottom.svg");
     // Legs screw holes
     color("red") {
         for(i=[1:1:3]) {
-            rotate([0,90,i*120]) legScrew();
+            rotate([30,90,i*120]) translate([0,24.5,-7.5]) screw("M5");
         }
     }
-    // Center screw hole
-    rotate([0,0,120]) {
-        translate ([0,-13,8]) {
-            union() {
-               rotate([90,90,0]) {
-               DIN931("M3");
-               }
-                translate ([0,1,0]) {
-                    rotate([90,90,0]) {
-                    DIN931("M3");
-                     }
-                }
-            }
-        }
-    }
-}
\ No newline at end of file
+   // Center screw hole
+    translate([12.95,0,0]) rotate([0,90,00]) screw("M3");
+}
diff --git a/tir_sportif/tripod/stl/02_center_bottom.stl b/tir_sportif/tripod/stl/02_center_bottom.stl
index 6b70ee3..9b70d5c 100644
Binary files a/tir_sportif/tripod/stl/02_center_bottom.stl and b/tir_sportif/tripod/stl/02_center_bottom.stl differ
diff --git a/tir_sportif/tripod/svg/center_bottom.svg b/tir_sportif/tripod/svg/center_bottom.svg
index 3603a5d..a6d218f 100644
--- a/tir_sportif/tripod/svg/center_bottom.svg
+++ b/tir_sportif/tripod/svg/center_bottom.svg
@@ -7,7 +7,7 @@
    viewBox="0 0 66.894806 66.159561"
    version="1.1"
    id="svg1"
-   inkscape:version="1.4 (e7c3feb100, 2024-10-09)"
+   inkscape:version="1.4.4 (dcaf3e7d9e, 2026-05-05)"
    sodipodi:docname="center_bottom.svg"
    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
    xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
@@ -23,11 +23,11 @@
      inkscape:pagecheckerboard="0"
      inkscape:deskcolor="#d1d1d1"
      inkscape:document-units="mm"
-     inkscape:zoom="1.8107225"
-     inkscape:cx="-0.27613287"
-     inkscape:cy="80.354665"
+     inkscape:zoom="2.5607483"
+     inkscape:cx="-0.19525542"
+     inkscape:cy="-3.7098531"
      inkscape:window-width="1920"
-     inkscape:window-height="1015"
+     inkscape:window-height="1016"
      inkscape:window-x="0"
      inkscape:window-y="36"
      inkscape:window-maximized="1"
@@ -42,7 +42,6 @@
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 </svg>
diff --git a/vélo/sl_center_cross.svg b/vélo/sl_center_cross.svg
new file mode 100644
index 0000000..ac028b0
--- /dev/null
+++ b/vélo/sl_center_cross.svg
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="22.264088mm"
+   height="22.264042mm"
+   viewBox="0 0 22.264088 22.264042"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.4 (dcaf3e7d9e, 2026-05-05)"
+   sodipodi:docname="sl_center_cross.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="mm"
+     inkscape:zoom="6.8423252"
+     inkscape:cx="42.090954"
+     inkscape:cy="42.164029"
+     inkscape:window-width="1920"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="36"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-38.794546,-21.332069)">
+    <path
+       id="path3"
+       style="opacity:1;fill:#ff0000;stroke:#ff0000;stroke-width:0.2;stroke-linecap:square;stroke-linejoin:round;stroke-miterlimit:0;stroke-dasharray:none;stroke-opacity:1"
+       d="m 27.966469,37.580567 c -0.272957,0.272958 -0.272958,0.712919 -4e-6,0.985873 l 1.564676,1.564676 a 9.8900003,9.8900003 0 0 0 3.65e-4,6.929954 l -1.564672,1.564672 c -0.272957,0.272958 -0.273323,0.712554 -3.69e-4,0.985508 l 4.812783,4.812783 c 0.272954,0.272954 0.712916,0.272953 0.985873,-4e-6 l 1.564672,-1.564672 a 9.8900003,9.8900003 0 0 0 6.929589,0 l 1.565041,1.565041 c 0.272954,0.272954 0.71255,0.272588 0.985507,-3.7e-4 l 4.812781,-4.81278 c 0.272957,-0.272958 0.272956,-0.712186 10e-7,-0.98514 l -1.56504,-1.565041 a 9.8900003,9.8900003 0 0 0 3.68e-4,-6.929957 l 1.564672,-1.564672 c 0.272957,-0.272957 0.272958,-0.712918 3e-6,-0.985873 l -4.812783,-4.812783 c -0.272954,-0.272953 -0.71255,-0.272588 -0.985507,3.7e-4 l -1.564672,1.564671 a 9.8900003,9.8900003 0 0 0 -6.930322,3e-6 l -1.564676,-1.564675 c -0.272954,-0.272955 -0.712548,-0.273322 -0.985505,-3.64e-4 z" />
+  </g>
+</svg>
diff --git a/vélo/support_lumière.3mf b/vélo/support_lumière.3mf
new file mode 100644
index 0000000..78e0125
Binary files /dev/null and b/vélo/support_lumière.3mf differ
diff --git a/vélo/support_lumière.scad b/vélo/support_lumière.scad
new file mode 100644
index 0000000..e180a89
--- /dev/null
+++ b/vélo/support_lumière.scad
@@ -0,0 +1,36 @@
+$fn = 60;
+
+include <BOSL2/std.scad>
+include <nutsnbolts/cyl_head_bolt.scad>;
+
+base_length=94;
+base_width=40;
+base_height=3;
+supp_length=30;
+supp_width=30;
+supp_height=7;
+
+module screw(size) {
+    *nutcatch_parallel(size, clh=0.2, clk=0.2);
+	hole_through(name=size, l=10, cld=0.2, h=10, hcld=0.4);
+	*nutcatch_sidecut(size, l=20, clk=0.1, clh=0.1, clsl=0.1);
+}
+
+difference() {
+    // base
+    union() {
+        prismoid([base_length,base_width], [supp_length,supp_width], h=supp_height, rounding=5, anchor=TOP);
+        translate([0,0,-supp_height]) cuboid([base_length,base_width,base_height], rounding=5, edges=[FWD+RIGHT,FWD+LEFT,BACK+RIGHT,BACK+LEFT], anchor=TOP);
+    }
+    // screw_holes
+    color("red") {
+        for(i=[-25:50:50]) {
+            translate([i,0,-supp_height+9]) screw("M5");
+        }
+    }
+    // holder_hole
+    translate([0,0,-3.41]) zcyl(d=24.8, h=1.85, rounding=0.925, anchor=BOT);
+    rotate([0,0,45]) cuboid([24.8,8.5,1.65], rounding=2, edges=[FWD+RIGHT,FWD+LEFT,BACK+RIGHT,BACK+LEFT], anchor=TOP);
+    rotate([0,0,-45]) cuboid([24.8,8.5,1.65], rounding=2, edges=[FWD+RIGHT,FWD+LEFT,BACK+RIGHT,BACK+LEFT], anchor=TOP);
+    zcyl(d=20, h=1.65, rounding=-0.825, anchor=TOP);
+}
diff --git a/vélo/support_lumière.stl b/vélo/support_lumière.stl
new file mode 100644
index 0000000..3f0979a
Binary files /dev/null and b/vélo/support_lumière.stl differ
diff --git a/vélo/test.stl b/vélo/test.stl
new file mode 100644
index 0000000..e3ad42c
Binary files /dev/null and b/vélo/test.stl differ