It's really not bad at all. I'm just taking my time and making every joint as tight as possible. I cut the piece close to fitting and then sand it to fit. So far it hasn't been an issue and I'm really surprised how quickly it is all coming together. I'm trying to picture the plane already assembled but I'll have to wait to see how it all looks when finished. I'll be getting back on the build this week as I've been out travelling for work lately. Now I get to spend some time at home!