I am installing larger format Porcelain Tile (18"x18") over ditra on a plywood subfloor. I do not want to use unmodified thinset like they recommend. The TCNA says modified in their installation handbook and with my experience modified is best for tiles and that's how I do it, but I am looking for a better way of cutting the setup time of modified thinset on top of a vapor barrier type product. Rapidset has been suggested but as many of you know it can be a really big pain to work with.
I am looking into a cement mix accelerator from homedepot and I am wondering if cement accelerators would be a good way to cut the setup time so I can grout within about 12 hours.