I ask because I am in a situation where I am creating wheels on a car. I was forced to use welds because updating the wheels' CFrames every heartbeat caused horrible stuttering client side. Welds solved the stuttering, but the changes to the their C0 and C1 values by the client do not appear to replicate on the server, even though the wheels themselves are set to be network owned by the player. Does anybody have a way to fix this? And if it is just a limitation of welds, what might be done to implement an alternative?