Time for a full report on my travel trailer braking woes.
Short version:
My trailer seems to stop pretty good I'm happy with the new Max Brake controller
Long Version:
My travel trailer braking woes started last camping season. In early August I found that 3 grease seals had gone bad, the 4th was on its way and it had ruined the brake shoes#@$%!. I installed 4 new complete backing plates and had the drums checked for resurfacing. Took the trailer out in the fall for another two trips and the brakes were very weak to mediocre at best. It seemed like the left rear brake was doing most of the braking work. I could tell this because the temperature of the drum and I use a Hensley Arrow hitch. If the brakes aren't adjusted equally you will notice the front of the trailer moving around when coming to a stop and I was getting the infamous "Hensley bump".
Over the winter I changed out the trailer wiring. I used a 10 ga wire from the umbilical cord to a point near the axles and 12 ga wire from that point to each wheel.
I tested the trailer brakes on gravel by pulling the emergency brake cable and seeing if the brakes would drag some gravel under the wheels. Again only the left rear would drag. The results were the same with when I used the manual lever on the Prodigy controller. (when the trailer was jacked up I spun each wheel and pulled the emergency brake cable and each wheel would slam to a stop so I knew the brakes were working on each wheel). Adjusting the brake shoes did not seem to make a difference (rechecked the brake adustment several times).
Just for grins I hooked the trailer to my brothers 2012 Dodge pickup with integrated controller and took the trailer for a spin - for the first time in a long time the trailer brakes seemed to be working.
I ordered the Max Brake controller from Dutch and Di
http://www.plugitright.com/MaxBrakeController.html. Since my truck is a 2009 it is somewhat a transition year so Di had to send me a two different brake line tees and brake wire harnesses to see which one would work correctly. Anyway we went on a quick camping trip over the weekend and the trailer seemed to stop pretty good. I like how much adjustment you can make to the brake controller and there was no instance of the "Hensley bump" when coming to a quick stop in traffic (gain was set to G60).
The Max brake is expensive but seems to be worth the money from the results from our first trip out. My only gripe is that they sure could put it in a smaller, more attractive looking case, I may have to paint this thing... ... ...

Also forgot to mention how much smoother the overall braking was
One other test I did was on a 16' tandem axle landscape trailer. I could tell immediately how much more power was put to the brakes on this utility trailer and had to dial the gain down to near G zero when the trailer was empty when the Prodigy had to be dialed very high to get some braking effect.