Having given up on the Ilford 500 head for now, I got lucky on a 5500 dichro head. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140214905938 One question that remains is, does it need some magical bracketing to mount on the D5-XL chasis? Do I need anything else with this or am I ok with my regular negative carriers? Is there a table that converts dichro cmy settings to equivalent Multigrade values or shall I use the filters under the lens? Does this use mixing boxes to do smaller than 4x5 negatives or is it as it is supposed to be? How does this compare to the Ilford 500? Will it be worth trying to come up with the rest of the parts for the 500 or just part it out on ebay?