The bottom of the wing and stab are purple, and the fuse is yellow like the top. The only thing I've noticed is that my nylon bolt for the wing doesn't seem to tighten down right. I may have to get a new one, but I really haven't looked into it much.
I don't think you'll be able to squeeze a .61 in there without some major modification. My .46 fx was pretty tight.
That's my roommates tax return, mine's already spent
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