i've seen my share of giant scale planes that have the same type wing retaining method as you're describing. it always amazes me that each 4 ft wing section is held in place by one 1/4 nylon bolt. as to which is better- i can't say

imho i think that either way would be acceptable

maybe the bolt in the wing and the nut on the inside of the fuse could be a bit better because you could drill a 1/16 hole through the stud and then secure the nut from backing off with a piece of wire (i've seen what happens when this bolt backs out, and-----it's not funny.)

however the blind nut in the wing and the bolt through the fuse would hold just as well, just make sure the bolt doesn't back out i.e. grab both wings and pull outward - just to check

i have a 40 size uproar and this is the only thing i don't like about it- the wing is glued to the fuse so it's a bit cumbersome to transport. however it flys great. i can throw it up in any condition and have a ball with it. i've flown this plane in winds when the 300's, yaks, and bipes wouldn't even think of going up. how about starting a thread on this build??? this one is in my "future builds) list.....i'm currently around 50% completed with a GP super skybolt bipe and next i'm going to scratch build a .40 size ugly stick (one of the flyers still has his unassembled kit he just uses as a template.