While I have not tried the "tape down" method of flattening. I can see that it would be time consuming and frustrating compared to the simple method of putting a print in a dry mounting press. The surface area required for taping down and drying would need to be large if you are hanging a show of any size. The potential for inclusion of foreign matter into the print surface is compounded by many magnitudes. But then your experience may not parallel mine. Who knows this may be a new and better way of doing things.