How well does GI Joe mix with SW?

Posted in Custom Workstation

I don't mean in size but in look, especially the arms? I'm thinking maybe using GI Joe arms in my SW-based fig would solve some arm issues I'm having. I just got a Doctor Who Amy 3.75" and the arms are bizarre and thin and look like they'll snap off. The Marvel figure I found a thrift store, I just don't like their style. The biceps are so bizarrely flat. I'm liking the look of some of these GI Joe's I'm scouting on eBay and just wondering if anyone knows how well those arms swap with older style SW black series/30th anniversary.