I had a couple conversations w/Jon in the last couple of years. He was patient, answered my questions, made suggestions, didn't try to "up-sell" me, and delivered a well-built product at a fair price. I have a UFO "Dragstar" 4/1 I am running right now, and have both the shorty 'bologna-cut' stub tip and his megaphone for it, though the muffler I have currently is from a literbike, I call it my UFO-"Franken-can (as in 'canister')."
I read the stories of people having difficulties w/him. That was not my experience. I also had my mechanic who purchased many parts from him over the years, and he said his stuff was as-advertised, did what it was claimed to do, was well-built, and he never had any falling-out w/him.
So, now that the guy is gone, I hope the site for this thread is going to allow him to rest in-peace, and if you want to mention that your disappointments began w/"A" and went through the alphabet, my suggestion would be to start another thread, or resurrect an old one, we've seen enough complaints by members about their disappointing experiences w/Jon, you should be able to find one. Let's save this thread for the 'rest in-peace.'
He did have success in the Vmax world, and I hope someone either continues the company, or it's bought, and the products continue to be available.