feeding uber-tube pre-game - legal?

[wireties]

The game pieces were way more pressurized (at the Alamo) than we anticipated and we could not manually feed the uber-tubes prior to the start of the game. A referee suggested we put in a momentary manual switch that would power our gripper rollers just enough to insert the uber-tube. He said it would be legal but he is not an inspector. I modified a set of double-pole limit switches to do this and it works great. There is no way they could affect the FMS control of game play, safety etc.

But is this legal?

TIA