I have bought a Saito 91, 100, YS 110, OS 91 FX, OS 46 FX, OS 46 AX, and something else on eBay. No problems with any of them. Some needed some TLC (aka maintenance) but I'd be surprised if it takes more than 15 min. to tear any one of these down (except the YS) for inspection. Another 15-30 min assem. including replacing the parts as necessary. Definitely not rocket science. If I could only fly. Emmmmm

Oh, just a thought ...

One wing building area that Isometimes "forget" about is making sure that the ribs are secured so that their tips & tails are aligned with the plans - not just at the spars. Mostly, not an issue if they aren't dead on. I use scrap balsa cut into 1x1 or 2x2 blocks and pin them to the table with a couple of big "T"pins. Isandwich the ribs (or their stand offs) between two blocks pinned to the table. They work as a couple of additional fingers while I apply thin CAor use Titebond and holding things straight when weight is added.

Keep up the great work!