Problem description: CTRL+P Set Parent to - Armature Deform - With Automatic Weights assigns weights to the zipper (fig. 2), but when rotating the bone mChest by Y 90 degrees, the zipper moves out of its relative position to the top (fig. 3). fig. 1 fig. 2 fig. 3 Also, after uploading the zipper and the top to SL, the zipper does follow the avatar movements but does not stay in its relative position to the top. Changing the weights manually so that relative positions stays the same in Blender, does not affect the independant movements in SL. Questions: Can an object be too small to take advantage of the automated weights? If the vertices are too close to each other? Is there a restriction regarding the minimal size for mesh uploads in SL?