I've had a similar problem with Tail Gunner for V3, trying to make it fit V4. I did run the figures through WW2, but (I'm assuming) because the mesh of the right boot seemed to be intertwined with the left boot, the resulting figure was unusable.
Probably something I was doing wrong.

I ended up taking that boots mesh into Blender and manually re-sizing and reshaping it to V4, which 1. gave me the opportunity to have a look at an unnecessarily complex mesh and 2. showed once again what an incredible tool PhilC developed when he made Obj2Cr2.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks