I just started experimenting with my new DryTac mounting system. There is a learning curve. The first effort was a bust. Number 2, however, appears to be gallery quality (with some border trimming needed due to a fingerprint).
I'm working with 24 x 34 inch (approx.) prints.
The instructions are minimal and not very useful.
So far, I'd say using the DryTac pressure roller to put the mounting adhesive on the acid-free foamcore first is the way to go. Then the paper backing of the adhesive can be removed, leaving the adhesive on the foamcore. Using removable scotch tape to make an "open book" like arrangement of the print and (now) adhesive-foamcore combination on a flat, clean surface allowed me to accurately place the foamcore on the face-down print. My old darkroom, roller designed for squeegeeing glossy silverprints on the "chrome" metal for drying seemed to work to adhere the (satin finish) inkjet "paper" onto the foamcore-adhesive substrate. I did not like the idea of scaping the flat plastic pressure tool (that is included in the DryTac paper roll) across the face of the print. I used scotch tape to cover the adhesive that was outside the edges of the print (with 1" white border). Avoiding the adhesive getting onto surfaces that you don't want it on is clearly one of the things to keep an eye on.
Good luck. At the moment, my opinion is that my old dry mount press is going to be history, but my experience with the DryTac system is very minimal at this point.
Paul
www.PaulRoark.com