I would go with bolt on wing, if you follow instructions you wont have any problems with the alignment. the plus side is no rubber bands to mess with or buy or forget to bring. this is just me but I have flown a lot of planes using rubber bands in the past and have had problems with the covering messing up wood cracking from the stress they put on the top of the wing. when they started coming out with the kits with optional bolts I always went that way. the only downside I can think of is be careful not to over tighten the bolts.