still problems with hydraboost

[68protouring454]

guys i am about at my wits end with the hydraboost.
i have 1000 miles on it, and it still stops the steering if you apply the brakes while turning in a parking lot, during autox etc.
if steering alone it is fine, if braking alone it works fine.
heres what i have done, motor is an ls6 with a re worked turn one pump.and the 2gpm reducer fitting for the gm pump to work with ford rack.

1. installed hydraboost, with return line being t'd into existing return, got pedal push back, and deal with steering.
2.installed a 2nd return above fluid level on my reservoir, this got rid of kickback but steering still stops for a split second if you hit the brakes.
3.called turn one, talked about it, and he suggested i install a higher pressure bypass in the pump, so i got one from him which ups pressure from 1200 to 1500psi, did not help at all.
4.took out 2gpm pressure valve, installed gm 3gpm and still the same problem
what else is there to do? its very annoying, and i really don't want to go to manual brakes but i am not putting a booster on it.
ideas? hydratech doesn't answer emails anymore and there vendors won't help me as i did not buy it from them