A Model Mirror Plugin that preserves motor6d in model

When I do animation I want to create a symmetrical rig, so it means for absolute accuracy I use the model mirror plug in. Problem is, when mirroring using stravant’s mirror plug in it actually deletes the joints. Any work around for this?

Motor6Ds tend to yeet out when you move their parts in edit mode so you’d probably have to recreate the rig manually or make your own plugin (unless someone has actually done that)

Anyone have source code of the Stravant Plug in?