Hi there. I have never used a press in my holster making, BUT I have been considering making and using one for molding holsters and mag pouches. While trying to think things out, a question arose in the old grey matter. When molding a mag pouch where you want the back to be good and flat, do you place the pouch on a hard (inflexible) piece of wood, steel etc. prior to molding, thus allowing only the top piece of rubber to do the forming? Or, is there a problem with that. Any help would be appreciated, thanks. Mike