I am cleaning up a no caulk drain installation. A vinyl shower pan guy
layed Henry's asphalt emulsion over the cinch bolts and bonded washers
(bolts that cinch the upper and lower assembly). The solvent ate the rubber
underside of the bonded washers. I have new bolts and washers and want to
replace them. How tight do I cinch them down? Even though bonded washers
came with the assembly, am I better off just using standard stainless plate
washers? Also, I want to have a screw down grate rather than an instaset
design. Can I just replace the instaset top with a screw down drain top?