I put the OS 91FX in mine with the perry pump and tank on CG. I have about 15 or 20 flights on it now. I have not adjusted the pump yet but the engine is running pretty rich through the mid range. I'm not real sure which way might improve it though. The obvious would be to reduce pressure but that may have the opposite effect after adjusting the main needle to compensate for the reduced pressure.
The Perry is only half the price of the cline. That's worth a couple gallons of fuel and burning fuel is the best upgrade you can get.
later,,,basmntdweller