I have a set on my Comp Arf Viper. I agree the manual is little confusing-or at least it was to me. As to the power switch, I didn't install one. I am just plugging in my battery when I get to the field and unplug it at all other times. I never charge any LiPo batteries in the plane and have to remove the battery to charge anyway so didn't see a big need for the switch. Maybe not the right way to do it but has worked ok so far.

As to the steering servo, I didn't even try to run it through the gear controller. I am just using a separate channel and a mix to control my high and low rate steering and also to turn off the steering servo when the gear is retracted. My steering is a pull-pull setup as there wasn't much room to mount a direct drive servo in the Viper.

The gear have worked great so far. I have the early version of the electric brakes and they are not as strong as I would like but I understand the newer generation may be better.