ebor
Super Freak
they experimented. Hulk is using a new arm type, with a pvc covering and skeleton. something they've not done before.
as for every other Hot toys shoulder to date, Iron man Mark VI has swappable arms. wouldn't be too hard to do a similar system to that to make them swappable.
The sort of did something similar with the Marcus Wright figure. With some success. The issue was that the elbow joint was weak and could easily break with lateral force placed on that joint. I think for asthetics that they should chance this system instead of 'switch out' arms, those would be too limited IMO.
... an extra Banner HS would be aces