After fighting with transfer slot positions and lengths (especially on older dominators) and based on a couple of recommendations from some carb builders, I am using the BLP dual pattern plate. If you are comparing it to other plates pay extra attention to the transfer slot (width, length and position) in relation to the throttle blades-BLP seems to get this right and it will pay some dividends setting up the carb. It is a nice piece, I use it on my Quick Fuel 950 annular main body. I will say that I have never bolted it to one of my 4500 intakes but I could as the carb is already out and I have a M1 4500 under the bench.