Roblox Rig, resizes at run time, after I try to edit it

  • What are you attempting to achieve?
    A classic r15 roblox rig with extended body parts
  • What is the issue?
    The body parts become normal when I run the game

So I’m trying to edit a rig for my game in roblox studio by resizing its bodyparts, but they snap back in place when I run the game:

I’ve also tried removing some vector3 values from those body parts, but that also didn’t really work:

Another option would be to edit the rigs at run time (for example using scripts), but that would be difficult for obvious reasons.

Please help!