The product fits well on the 2019 F250 STX, no extensions, no pads. The durability seems good after a few months of use. Installation was a little tricky as the standard screws are a bit short to get through the valve and then hook into the threaded clips. If the clamps were stronger or the screws were longer, this would be a lot easier. Just like you, you should try to clamp all the layers together and then hold the clamp while you drive the screw in. Not great fun, but doable.