That's interesting, Hud - thanks for the info.

My final adjustment was to put the battery back where they suggested in the foam. I've still got the 2.5 oz spinner and have added 1.5 oz of lead to the firewall. It seems about right now.
Why there should be so much difference I really don't know unless you like 'em livelier and I like 'em more stable :-)
Cheers - LeeHop