I use an Ilford MG500 head (4x5) on my Durst 139G, but I much prefer larger format negatives and would like to buy/make a Multigrade head for 5x7 or 8x10. According to Jack Coote's book "Ilford Monochrome Practice" Ilford made a MG500H head for 5x7 and also a MG100H head for 8x10, but I have never seen any. Has anyone used one of these heads, or know of any possible sources? Ilford-USA and Ilford-UK have been no help; Nova Darkroom in the UK has a 5x7 system but I'm across the pond in the US, and they haven't responded to email inquiries. I do have two almost complete MG500 systems that I could modify or raid for parts to build a 5x7 or 8x10 head, but I'd much prefer to get some pictures/sketches/drawings of the factory heads first before starting such an involved project. Thank you for your help.
I have an 8x10 MG500 system along with 4 4x5MG500 systems. A friend of mine recently got one for his 5x7 Durst but I have not seen it yet. From pics I have seen it looked like the 4x5 head with a "chute" at the bottom of it to open up to fit the 5x7 head on the enlarger. You should be able to make something like that without having to cannabilize the head itself.