X2 on re-wiring. I have dramatically improved the braking on 2 trailers by replacing the brake wiring. I usually go with one 12 gauge pair to each axle landing them at the junction box at the front of the trailer. I only know of 2 manufacturers of drum trailer brakes: Lippert and Dexter (who has bought up everyone else.) On 6 different trailers the best brakes have been ALKO (bought up by Dexter) and the worst have been Lippert--just my experience. Brake parts are all the same dimension. Dexter parts will fit the others and that would be my choice. X2 on the neutral reaction of the trailer brakes. I went through lots of upgrades of some Lippert 4400 lb axles trying to get them neutral--that will always be my goal to be neutral.