Josh
I'm a big Powerbox fan, but the UF does not need one, its just weight. We designed the wood to take the Sensor switch with two 2200 Li-Pos
150mAh per pack per flight is maximum useage.
In the UK 99% of UF models use the UF, I know of two with over 1000 flights both using the PB Sensor/2 x 2200 Li-Po set up.
Dave