Hi Michael,
No, I haven't build the gun yet as I mentioned in the review. My advice would be build it first and test fit to your build.
As figure D has arms and hands complete there souldn't be any problem there. Figures A, B, E and F all have separate /hands hands so both amrs and hands can be adjusted to fit.
Figure C has the odd cuffs as mentioned, but he too has ssparate arms/hands so again there sholdn't really be a problem.
I'd probably fit arms/hands to the kit part first then add to the figure, at least that was my thinking when I was building them.
Cheers
Al