I don't have access to your paper but I have dry mounted to several different types of museum boards.
The tissue does not need to be cut 2mm smaller. I tack and trim the photograph and the tissue together so they are the same size. No bleeding or oozing out have been observed. I also use relatively low temperature and pressure. No embossing effect has been observed.
I *can* tell there's something on the other side if I look at it from the back side but that's because the paper isn't completely light proof.
When I take it out of the press, I take the whole assembly, the mat board sandwich assembly (mat board, release paper, photograph, mat board) and place it under a thick glass plate to let it cool. That prevents warping.
You'll have to test this yourself as the result depends on the paper, pressure, and temperature, as well as your complete process.