This looks very nice. Please keep us informed on how this enterprise evolves as I am interested in doing Wet Plate with an old 8x10 that I have (needs to be restored) and have held off on getting sacrificial 8x10 holders. Would this design allow for the use of the 8x10 holder and other format sizes like whole plate, 5x7, square (8x8) etc...? That would be ideal :-)