RE: HB .61 PDP
Yes. I might even say push it a little and try the full wave pipe as I think you are going to be using this it the pattern ship. When I was making the jump from muffler to pipe there were no 1/4 wave pipes that I knew of. If I could make the adjustment (with some pain) I think just about anybody can. As for tank size are you looking for a 16K RPM set up or a 12K to 13K RPM set up. Is noise an issue at your field?
All the best,
Konrad