I am renovating a bathroom and want to replace the chrome fixtures with brass. I am concerned with how to replace the chrome tub drain/strainer with a brass replacement set. In particular, I want to be sure that removing the tub strainer will not result in the waste pipe slipping away from the tub because I can not get to it from below or the side (no access panel). Can I just screw the chrome one out and screw the brass one in as a replacement? Does the drain pipe have to be supported from below while this is being done?