My disc brakes will arrive this weekend and ready to put my 8-3/4 back together. I already have the axle gasket set from Dr. Diff. My question is the metal gasket that goes between the axle flange and the brake caliber bracket has an embossed face. Should the concave side of the gasket face the wheel hub or face the third member (looking at the flange) or it really does not matter. My old ones was compressed flat and worn so I cannot tell.