3dsMax - Edit Model without affecting rig?

Miscellaneous Forums/Content Creation Tools/3dsMax - Edit Model without affecting rig?

I have an animated model in 3dsMax, Physique, I think, rather than Skin. I want to make a low poly version of it for stencil shadow purposes, and I'm quite happy to edit it by hand, but it has a few thousand frames of animation and a nice rig on it. I would really hate to have to redo that, so I'd like to know if there's a way to edit the underlying model without affecting the animation. I tried dropping down the stack to the Editable Mesh level and editing it, but when I come back up to Physique, at the top of the stack, the animation is FUBAR'ed with vertices going everywhere.