Hi,
sorry for replying so late. It seems that there are two versions of the control unit. The older one does only support one paper storage. Also the control unit's labeling seems to be a bit different - no paper label. I bought the enlarger second hand, it is working perfectly. Two days ago, I did some tests on Ilford Multigrade Warmtone RC, I used the settings given in the Ilford manual, did a paper calibration and it worked very well. When I put in 10, it does not expose 10 sec.
I already started an inquiry at Durst and Ilford. Ilford does not have any support for the multigrade head any more. Durst sent me the manual of the newer version (with 5 papers slots). I also asked for a new firmware - which should work, as the PCB seems to be the same, but Durst Italy does not provide it anymore, Durst USA would charge $ 750 - which of course does not make any sense.
Can/wants anybody to read his EPROM with a flash programming tool (paper storage version) - I could then flash my EPROM with the newer version.
Another question is how to set for papers which are not in the manual. Should one set it to the setting in the paper manual - dual filter settings - for uniform exposure. Or do you test it your own?
If anybody is interested in the manuals (user/service/partlist), please send me a PM.