Hello. I'm a long time glow engine enthusiast who just now wants to start getting into marine glow/nitro engines. Who still makes these engines? Specifically, who still makes a marine glow engine that's of high-quality / high-performance that isn't just some knock-off with mediocre manufacturing tolerances, poor fit-and-finish, etc.? Here are the manufacturers I currently have written down which fit these criteria: AA (Double-Ace), CMB, K&B, O.S., Picco. Who am I missing? Thank you.