I managed to get the Stingray (mostly) done and rideable just in time for the Rockers Spring Social (see this post). However, it wasn't quite finished. I still needed to swap the carb, wrap some wiring, add a crossbar pad, and give it a few shakedown runs. It was by riding the bike I learned I needed to tighten the sissy bar clamps much more than I originally did (the seat slipped down towards the taillight, which could have damaged the fender) and that I needed to redesign the chain roller from a fixed wheel to something spring-loaded. I did all that and now I consider it done. Keep in mind, this started as a bicycle!!!
It was a ton of work but I'm very happy with how the bike looks. It's also fun to ride. Being fully automatic, there's no clutch or shifting at all. The bike has no suspension either so you certainly feel the road. The little 50cc motor isn't very fast but that's fine as it only has a single rear bicycle brake to slow you down anyway. If it had a lot of torque (which it doesn't) it would likely warp or destroy the rear wheel. It starts slow but steadily gains momentum. I got it up to 25mph (measured with a GPS-based app) before backing off as that felt plenty sketchy to me. It will likely go a little faster, but this thing is really just for cruising around.