You are right. The swingarm is stamped with Aprilla on top.
My "A" bike needs nothing other than tires and a fluid change. My "B" bike on the other hand required a new engine. I had some transmission issues last year that I knew needed to be addressed. Turns out, the repair was more costly than a replacement engine. I was able to source a 2006 engine off eBay for a pretty good price. Took some time, but it went in with only a few hiccups. It appears to be running quite nicely, but only running it on the track will show if there are any issues. Looking forward to seeing everyone again and wasting some knee pucks!