Yes. I built Sonex 122 with a Jab 2200. It first flew in 2007. I have about 350 hours now. I added autopilot servos in fall, but winter came before I got them dialled in. It’s a taildragger. It flies very well and is a lot of fun. The Onex looks like a nice airplane with lots of room for a pilot. I especially like the wing fold system.
You mention you built a plane and have an appreciation of ukuleles. I too have built and fly a Sonex, and have built about 7 ukes. I’m playing the most recent, a 5 string tenor. Send me your email address and I can send a few photos.