Yep... went from 31 to 29 on the HSAB after the first jetting from 88 to 90 showed no change, this make it too fat so I went down to 87s which made it too lean , the air temps were all over the place that week also so I switched to another carb that worked but was too small cfm wise its a demon 850 w/annular boosters which limits my rpm, We just stopped racing for the winter so I have some time to get it right, don't have that many HSABs to test with right now or too much experience fooling with the bleeds.