I' ve got a very similiar set up as you, except Pro Circuit's, VF3, and I'm at about 450 asl, when I switched to pods, I went up to a 350 main, 6 groove needle also, (don't know brand) was at second groove from bottom. I also had a noticeable bog off idle, went to a 32.5 pilot and couldn't really tell a difference even when I adjusted air screws, set needle up one groove and it was way better but still stumbled a little, went another groove up and cleaned it up. Just going up 2 grooves on needle made a huge difference.