Bob,
Things are looking up. I installed the 6oz Jett tank in the Arrow as you suggested, and plan to do the same in my Whiplash. NO MORE BUBBLES!
I thought from reading tech notes that I should set the needle a few hundred RPM below peak and launch. The result was a lean engine quitting three seconds after launch. I ended up setting the needle very rich so that upon launch it was not on the pipe, plenty of smoke. I think it was like 13K or such at launch. After launch it would quickly get on the pipe and scream like I hoped it would after all my efforts (and expense). It now hauls buns with the 8 x 9.75 but I wish I knew where to tach it for repeatable peak performance.