I am hoping to get some advice on a matter. I just got to the tiling portion of my bathroom remodel and full shower build. I have already taken all the necessary steps with a pre pitch, pan liner and mortar bed to follow. As I finished the last mortar bed I noticed my drain (top portion) had some wiggling room with it. The mortar was packed real nice and tight. This worried me so I took the upper portion of the drain off. Their is evidence that the mortar is packed up real good and thick in their but I am a little nervous as to the integrity of the drain. Is it supposed to be able to be removed like this? Should I use a cement patching compound and put it back in to settle? use a bead of plumbers putty around the drain while putting it in? or some thin set? Can the drain be removed just in case of replacement and I just need to pop a bead of silicone around to secure it? Any thoughts are helpful...? Thanks!