[BrentJ]

Originally Posted by nekng

Would a linear actuator such as the one at http://www.robotshop.us/firgelli-pq-...-actuator.html be legal?

Under Robot rule <52> I would say no, but you could ask under the official Q & A.

"B.
Electric solenoid actuators (note: electric solenoid actuators are NOT the same as pneumatic solenoid valves – the latter are permitted, the former are not)."

To me the part you want to use falls under the electric solenoid actuators category.