Coo I'm just relating what my experiences are with my set up(s).

Think about this for a minute though.....

On my OS 1.60 the needle valve is not on the carb, it's a remote needle. Bill Cline recommends that you place the regulator at the carb inlet between the needle and the carb. If what you say is correct then how could this possibly work since the needle is restricting the amount of fuel that the Cline sees, not the carb?! As strange as this all seems both engines, my 100 four stroke and my 1.60 2 stroke, respond the same to high speed adjustments with the Cline installed both in front of and behind the regulator.

When adjusting both all I seem to be able to get when richening the high speed is about 200 rpm then the rpm's stabilize and that's all I can get. IF I keep backing the needle out nothing changes, it just settles at the rpm it wants, so it seems. The engine runs fine either way, set real rich or only backed off a bit. Both settings make for a good smoke trail behine the airplane, inicating a rich setting.