Originally Posted by Solara

Club spec has only 3 options to adjust, and cannot be use with the USB interface.....USB is for the rest of the CIRTIX series ESC except club spec.

One of the design for club spec is.....we don't want it to be able to connect to any computer for TRUE SPEC racing. One of the rule on USVTA is, no computer or software upgradable ESC....Club spec is exactly one of those ESC that the USB interface will not be able to work. It is not something we cannot do on the ESC, it is something we are trying to do purposely so it can work with the true SPEC ESC rule.

You use only the plastic LED box for the club spec ESC adjustment.