One concern I have is operating an engine made to operate from a muffler pressured tank and venturi carb and using the pressurized Cline or Perry. I tried to use a Cline system on an OS91FX(new engine). It would run, but not as good as when using muffler pressure with the tank right behind the engine. My tank was 12 inches aft of the engine and hence my desire to use the Cline system. I have read on RCU of many who are happy with the Cline. However, on my setup with the OS91FX, it appeared that the venturi type carb just didn't work as well. I finally have gone to a YS61(pumped two stroke) and it seems to run just fine. Just my 2 cents worth and my experience.