Haven't built one myself, but a flying buddy did. He goes right by the letter of the law while I being some more experienced, I usually bash any kit a fair amount and sometimes literally.

He went down in a Hayfield and the fuse pretty well broke up behind the wing. Some wing damage, nose damage and minor damages all around. I finally got him to bring it over to my workshop and we rebuilt it in about 8 hours. I could have done it in 3 but two takes longer and I work a bit more diligently when helping other guys. After getting the fuse jigged in a line-up, just CAed lots of breaks, short pieces and then replaced/backed-up and-or spliced about all of it.

Anyway, I suggest making triangle gussets to fit behind all the joints in the fuse open area. I used scrap 1/64 plywood for them. Use alp. resin mostly with a spot of CA to pin them and you will have strong joints.
The back of the wing is a bit frail at the fuselage. We beefed that structure with some 1/64 ply overlay and underlay.

He couldn't tell any difference in the flying qualities and now almost a year and he works it out every so often.