Pressure needs to best balanced, I have no problems with devices that add all 3 Pressure/Timing/duration, Now Pressure Only needs to be treated extremely careful, it will cause spiking and surges that are damaging not only to components but Vehicles, garage doors, buildings,etc. Now the claim that the attitude does not increase pressures is correct. The Problem is it has no way of understanding current configurations', not to mention pump, rail upgrades. When we get extreme cold the Edge device May malfunction (To my knowledge Edge Products do not have stealth ability or Know valve memory or does it communicate with PCI out of OBD codes) I will share this experience, T&C offer their products for a very very short time, it was early Jan 04 I get the call that vehicle has no start condition ( Owner was on business In CA wife has truck 04 Duramax in Parking Lot at her Place of employment at 9pm with -27 wind-chill -40 ,I get wife cell # call her to let her know I have tow truck coming ASAP. . Now I knew that the edge device may be the problem but was not willing to admit to it, Truck was tow to shop were the tech was instructed by Me to disconnect the Edge device, This was done outside before truck was going to be push into truck bay, Truck started instantly, reconnected edge in truck bay no start condition, reconnection factory starts instantly, I ask edge to pay the tow bill, they declined... The tech (Edge) thought that the women should have been able to disconnect the device and reconnect factory harnesses AT -27. EVERY unit we sold fail in some way.