rc_cola1323
Here are a couple of links on 4-speed stuff that Jim Z. did. The killer bees used a 4 speed before I joined the team. It helps in an underpowered machine. If you are throwing 4 cims in the drivetrain or more, there seem to little actual benefits (as you already pointed out) other than the WOW factor.
4-speed tutorial:
http://www.killerbees33.com/index.ph...82&Itemi d=50
4-speed calculator
http://www.killerbees33.com/index.ph...83&Itemi d=50
sanddrag:
I cannot stress how impressed I was with that ultralight gearbox. Very cool. When I looked at it at the Championship, I was starting to notice some spalling on the gear teeth. How long did the anodizing last on your machine? Was that a service part, or did it last through a season, 2xseason, still running same parts today....?