Hello, I have just purchased a '19 TAB 400, and I have installed a DrawTite brake controller on my TV.
I have never used electric brakes on a trailer before. I have turned the gain on the controller up as far as it goes, and manually testing it from about 5mph I get a very gradual (graceful) stop even when moving the controller's manual activation lever immediately to its full travel. Walking beside the trailer, I can hear the Tab's brakes activate and release, but there is not a lot of stopping power.
When I fully activate the trailer brakes manually, using the controller, what should the braking force feel like?