I have used the Cline regulator system on both O.S. 160 and 1.20ax. Works absolutely flawless. Never have to re-set the needle, never goes lean, and will not let fuel to the carb at any time. You guys either have a faulty set-up, or a bad diaphram in the regulator. The perry pump is no way a better solution to delivering consistent fuel flow to the engine. I use the 120ax in a competative advanced pattern plane with over 60 plus flights on the current set-up. Over 100 flights on the 160fx. So not sure why you are all discounting the cline system.

Will