To answer your question, my experience has been that the Perry is better than most of the stock carbs I've dealt with. On my hoverbatic profiles that is all I run. They have been around a long time starting with Perry, then Varsanne, and now Conley engines distrubuting them. Seems to me that engine manufacturers go through alot of time and pain to make a good engine and then drop the ball when it comes to fuel delivery. I've had excellent results with Perry and OS carbs when I wanted to make a swap. I use the telescoping K&S tubing to make adapters, and also use a Sherline lathe at times to fashion them out of aluminum. Bottom line, if you don't like what you're getting, feel free to experiment. Don't be afraid to go to a smaller venturi either. Those gazillioin rpm ads look good, but at times fall short in the "ease of operation" area. I hate to fiddle at the field. Keep it simple and have fun_bob