First time mounting, fit and then removal is relatively easy. My grandson and I did it in a few minutes.
1. use hardware store bolts 4" long, grind the threads off and to a taper. I chucked mine in the lathe and smoothed them with some emery paper.
2. while slowly pushing the spar in place watch the lip of the fuse closely to keep from snagging the overlap. Also the rear spar tangs may need spread a touch.
3. keep in mind the outboard tip is higher than the spar. insert one of the larger bolts in a top hole. no need to force it, just get it on the taper as little. now have someone rock the wing up/down. At this time you can tap the bolt in further. Rinse and Repeat for another large bolt.
4. With 2 large bolts slide in, you can now do the other side. This will help balance everything. In the end I used a couple large and a couple small bolts/side. No need to drive the bolts in fly, you are going to remove them anyway.
5. Level the fuse and make your preps for the rear spar work....incidence, sweep, level, location.... Check , recheck, clamp everything, mark your drill location. then go to lunch or go home and think about it.
6. come back when your brain is fresh and check again. Drill away. It's easier than you think