lockmouth - the upgrade parts do fit the arena truck, not the alum. radio tray though. i don't know if you have seen the radio tray, it's a single piece compsite material, it appears to stregthen the chassis. your remarks about gene, andrew and the CEN guys is right on. one of the major reasons i swithced to CEN. Hx-racewy is my home track, hope you can make it this year for the Futaba Challenge, it is going to be even bigger and better than last year.
jlo