My original Flash that started this thread is now in it's third season (will be 3 years old in July) Hundreds of flights JR 8411 and 8321 (8311) servos using the Powerbox Sensor switch and two Thunderpower 2100 2s Lipos. I can have ten 10minute flights without charging!
The wood work is designed for this switch, it's perfect with a JR 921, JR 9000 etc.

Dave Wilshere