I use the local colleges lab facilities for mounting my B+W prints. I have been using Arista drymount tissue for Forte fiber paper. I have no problems when mo unting an 11x14 print, but things get complicated with a 16x20. The press is la rge enough to hold the 24x28 matt board without turning it. I place a sheet of 2 ply board over the top of the print and matt and close down the press for abou t 1 minute at 225 F. I have experimented with different times and move the prin t in different directions. The extreme edge never seems to clue down quit right on at least one side. I have to re-insert it several times in different direct ions and I still sometimes take the tacking iron to it with unpredictable result s. I don't think it has anything to do with the paper cutter or it would likely be a problem on the 11x14 prints also. Any suggestions ? Thanks.