I've mostly used my SP810 to process 5x7 film and a few dry plates. Haven't had any issues. Also have used it for 4x5 with no problem, even though having the SP445. Have done maybe a dozen 8x10 sheets with no problem either. Have to wonder if technique is a big factor here. When loading 5x7 I am careful to push it into a corner and close the lid slowly so air currents don't move the sheets.


Kent in SD