Thanks guys for the compliments. I still have to figure out why the 1/2 shift doesn't happen til 7800 rpm. As I said earlier, it was against the rev limiter at 8,000 rpm on the 1/2 shift. It may be I have the window too narrow for shifts. I have the circuits setup to only function while a throttle stop setting provides a path to ground for the air shifter. I will check and see if the window/ stop setting is coming in too late . I needed to set it up this way to keep the trans from shifting to safe neutral, since my shift pattern is now PR123N. I may still go to a separate rpm switch if there is one that allows different settings for each shift. For the life of me I couldn't get the MSD7531 to work like the book says it should.