When I set up my brake controller I had neutral braking; not too much trailer not too much truck. On all our travels I have been satisfied with the braking even when braking hard. However I never was ...
I cant get mine to lock up the TT's brakes either but during a panic stop last year (another dear) the brakes did let out a nice squeal. It kind of seams like the manual lever thingy doesn't put out as much as the momentum portion will. Either that or it's just the shifting of weight.