The Cline is such a precision device--it is so finely tuned--that any amount of overly rich on the low end just causes them to flood the engine.
I thought it was basically the same as the regulator in my weed wacker? It may be better than the regulator in the Perry pump, but I doubt it is that much more accurate. The main differance is that it regulates at slightly below atmospheric instead of postitive pressure, which may be better for many engines.