Hello guys im new here..I been helping my friend on his 392 cub..He has a set of 28pwks and right now we have a 55pilot and 150 main and needle in middle but still seems lean thru out except at idle to quarter throttle..Elevation is around 1500ft asl...does anyone have any experience with this set up to know a good starting point..We have tried everything except the main jet..Thanks for any info you may have...I havent messed with the 28's much...