Hi, I'm about to complete the installation of the Hardiebacker boards in my shower cubicle. Next bit is to seal and tape all joints with Thinset and the Hardiebacker tape which I already have. I intend to use a tanking kit to ensure that all is well before tiling. Question is .. I see that there is adhesive backed sealing tape in the tanking kit (Aquaseal kit in my case) Do I still need to use the coarse Hardibacker tape and Thinset on the cement board joints and then use the Aquaseal tape over the top? My concern is that I don't know whether or not the Aquaseal tape will stick well enough to seal if it has the Hardiebacker tape and Thinset underneath it. Or .. Do I just seal the joints in the board using thinset and then smooth off excess and, after priming, apply the adhesive backed Aquaseal tape straight on top without the Hardiebacker tape? Thanks very much. Dave.