George, the Unified Tow Brake does use a decelerometer but it is a hybrid. You're right in that it won't apply with the jake brake unless you apply the pedal. But when you do apply the pedal the 12 volts is applied "full on" to the decelerometer, which then controls how much braking you get. That's where the inconsistencies came in with my unit. It's also very critical that you mount the RV's control module at the right angle so that it can detect deceleration. If your Workhorse is porpoising or bouncing when the brakes are on you can forget about any toad braking.
Dave, I agree with your assessment of the sudden air loss. I didn't do the complete test like you did but I did note that it takes a long time to blow that much air out of the rear tank. The small air line doesn't allow anything catastrophic to happen. Like you, I did note that it stops shorter with the toad brakes, but I didn't try the full panic stop test. How many dishes did you have to replace after that test?
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