It is true that the IBC's work so much smoother that you don't feel the trailer brakes jerking the truck, but when you manually apply the trailer brakes, your trailer wheels should lock up if the gain is set up to max. Not that you would want to operate them turned that high.
At max gain 10.0 with lever fully engaged, the wheels don't lock at slow speed but do jerk the truck and stop fast. With the gain set at max at highway speeds, the trlr wheels don't lock but do engage, just not as hard as the Prodigy controller. I have never been able to lock up the wheels on dry pavement with this 12k lb. fiver, even with the Prodigy. . Should they lock up?
2013 Keystone Sydney 340FBH 5'er
2012 Silverado 3500HD, SRW,LTZ,4x4, Z71, Crew, 6.0 Gasser, 4:10 Gears, Standard bed
"These days, I have problems in areas that I used to not have areas", so life is good.