Hi Vin:

I've used them all, Jomar, Mini-Hobby, and JMP. Dave is using the one Bob W. sells. They all work.

Currently, I like the Tom Cook one. Sets up with just 2 dip switches. You can choose 3 or 5 second delay door close, with 1 second delay on gear down after doors open, which suits any plane I have ever owned with gear doors, and it has Gear Down Failsafe when you turn on.

It's what I have on my AD and SJ, one with mechanical servo valves(Robart), and the other with electronic valves(Jetronic).

Tom