I didn't notice much of a change on my 150 except as you said the high speed became less sensitive, once you get them set you can pretty much forget them except for big changes in the ambient temp. Also your Saito was broken in about three quarts ago, I have ten Saitos and have never babied any of them. They thrive on being used. Also, with the Cline installed my needles both stayed in the same place they were, others have said there was a big difference. I think that if a fuel tank setup was marginal before the Cline is installed there would be a significant change after.