I had 400 lbs of food and fuel in the back and a passenger up front, no issues at all with braking, in fact iot was greatly improved! You have the purpose of the load sensor slightly skewed/mis-understood, the system is intended to REDUCE braking forces to the rear with LOWER weight in the back and as the weight is transfered to the front during braking, when you use the brakes the weight is transferred to the FRONT brakes, thusly unloading the rears and this can cause the rears to LOCK up as they are carring alot less weight due to the short wheelbase.