Back in the early days we had these!

Three modern after market controllers were built that operated on a similar, but much higher level.
1. Brakesmart
2. Jordon
3. MaxBrake
Then there is the Direct Link that has limited distribution.
ALL other aftermarket controllers are a compromise!
I wanted to buy a Brakesmart, but the cost scared me away. Then I bought a MaxBrake and have kicked myself for not buying the Brakesmart years ago. Until you have used a Prodigy and switch to a better controller, you just do not know!!! I have had one as picture above, several others, two or three Podigy's and now a MaxBrake. Chris