OK guys just added full pics and specs and drawings etc etc for the Chevron rear mount steering conversion. So anyone that wants to build one should find most of what they need at rc-mini.net now.
As for Akuhons tyre question... Well, on a personal level, I still run X patterns (non-evil ones) but most of the other guys in our group run Pit Shimizu's or sometimes Rides (S compound) On a really large track we might use Type A 60D's, but they are compromised on turn-in.
The Tech 4WD M01/02 conversion? Its one of the few things that we havent been able to get hold of. Bizkit has one though although it isnt currently assembled I believe.