The antweights have their own set of rules (http://robotwars101.org/ants/rules.htm) which are worth looking through if you haven't already.

Antweights usually use either the battery plug as the removable link, or a switch is often more convenient. Some way of switching it off easily is required for all ants.



Servo boards need to have the position sensing potentiometer replaced with a pair of resistors to give it a fixed reference; there's plenty of tutorials on how to do this around. Also have to make sure the board comes from a big servo so it can provide enough power to drive the gear motor.


As for mounting spinner blades, I'm not too sure on that. You'll have to go through some of the photos on the RW101 forum to get some ideas.