If you can inspect the Swallow before buying it. That would be nice. I bought them from Giant Scale Planes a few years back. One of them had a completely sheeted wing and fuselage. That one was weak right where the fuse transittioned in the cockpit area. The other one i had had openings in the wing and the fuse. it was a little bit lighter. But more importantlly had some kind of reinforcement. not really a fiberglass maybe a filament tape was glued in that area. was stronger for sure.

Also I want to say the instructions called for the CG at 115mm behind the leading edge. That was totally incorrect. 165-175 mm was more like it.

The wheel pants were real thin and light and lasted eight count em eight takeoffs and landings off grass. Ended up using bolly wheel pants.
Used a YS91 and a 110 on them. Did try a OS91FX on the lighter one. And it flew it well. Just not sure if it was my setup or tuning ability
Never could keep the FX running.