Hi! Being from the pre multigrade era and after years of Video picking up pace again. I am busy learning to make my own printing paper and glass plate emulsions ( the Lightfarm Tutorials ). I have an old Teufel enlarger for 13x18 cm and a Kienzle up to 9x12 cm. I wonder if this Led lamphead could be used for enlarging on AZO paper. A lot has been said about this but I sure will give it a try. It will take a couple of months and IŽll report back on failures and hopefully successes. Thanks a lot. Henk