diff --git a/stl/alts-and-deprecated/x-tensioner-3mm.stl b/stl/alts-and-deprecated/x-tensioner-3mm.stl
new file mode 100644
index 0000000..e0bf737
Binary files /dev/null and b/stl/alts-and-deprecated/x-tensioner-3mm.stl differ
diff --git a/stl/alts-and-deprecated/y-tensioner-3mm.stl b/stl/alts-and-deprecated/y-tensioner-3mm.stl
new file mode 100644
index 0000000..ffab3f0
Binary files /dev/null and b/stl/alts-and-deprecated/y-tensioner-3mm.stl differ