Just a reminder, thanks to several Poser gurus, that morphs are linear: Small bend angles don't look too bad but, above ~30º, forget it...

So, sliding doors / windows on a panel van are okay, cab doors may open 'ajar', but back doors will not 'swing back' as intended.

If I could work grouping etc, I'd arrange pivot axis, dial etc to twirl each back door by ~270º with limits.

I got around my lack of skill by using a $$ utility to convert that free MMD/PMX vehicle with such morphs to FBX...