Evil_S10
Ah... ok, I see. You have the CF chassis kit without the battery tray. The part# for the battery tray is 50703. If you use that battery tray, you can use stick packs or side-by-sides if you don't use the battery "cups."
Fit, thanks for the suggestion. Do you know if those tires come in any kit? The class that I am racing the 03FS in requires the use of kit tires. No Hop-Up or Type A or B tires are allowed.