Melling pump cover bolt torque

I had it done to help with efficiency and help boost psi at lower speeds, it is mast produced and not perfect, and if this design is so perfect then why do is there a need to offer these coating, even melling on there billet pumps have a costing done to the gears. Everyone can believe what they want, lots of teams use coating on alot of things, even rear gears and seen lower temps and they are always in gear oil. Guess you don't buy pistons with this protection either since its a bunch of non sense, keeps tolerances longer. To each is there own nice thing about this hobby. If you buy your pumps from precision oil pump those are all coated gears too.