Ya i was thinking that with dual aileron servos flaps and such i would just run an extra battery pack and using a y harness plug the retracts and smoke pump on the same servo, when the wheels are down the smoke is off and when they are up the smoke is on. I was also thinking i might rig it up with my throttle servo and when the throttle is over 1/2 the smoke would come on. Not sure but an 8 oz. tank would be tops in my eyes. Lots of ideas and a little while until i am there yet.

Flyboy76