Jep! The arms aren't really moveable. Just finished mine last night. Cant reach my own head anymore. That prette messed up.
Cutting out that piece in the bicep might be an option. What i think is a big problem is that the rond hinge parts were the big screws go in, arent parallel. The run from narrow in the front to wider at the back. Wich causes the forearm to sqeeze at a certain point. dont know if i can change it now, since its finished.
Anyway here are some pics of my progress.
Left arm:
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Neck that opens and close, incl brace (with underarmor details) and upper chest plate attached.
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