I received the following response from SMI:
"We recommend that the motor to the adjustable pedals be disconnected or the pedals be moved all the way toward the drivers seat when being installed. This will result in you having to move the pedals all the way toward the seat every time you tow. "
So I am still limited by this unit wrt to adjustable pedals and memory settings....I guess it isn't a big deal.
Otherwise the I like the smi unit because the toad brakes don't come on unless the brakes in the coach (not engine brake) are applied, also from SMI:
"You are correct, the AFO cannot engage with the exhaust brake since it requires air to be applied from your brake pedal to activate. "
I believe with the US Gear (Roadmaster) system the toad brakes come on with the engine brakes. That's ok if they are set up so they aren't trying to brake more than the what the coach is doing; don't need a 4500 lb explorer trying to stop a 40000lb coach
Jeff