I've been modding Topre with MX sliders for years and think that if you do it right, it will be pleasure to use.
I did dental bands in the past, used kbdfans silent-x rings, but only when recently used deskeys #3 rings I found perfect rings for topre.
Problem with mx on topre is stem lengths of some caps - I think GMK are too short or something. Novatouch could be a good example of it - cannot remember but I think when I put GMK on Novatouch, there was some issue with mod caps...
I prefer SA od MDA on it.
My latest purchase, Realforce R2 tkl, modded with Novatouch sliders and Deskeys #3 rings, lubbed stabs - perfection! That thoooock.... mmm.... highly recommended!