Hi all I find all the above post very interesting as I have been using sanguinololu for about 2 years now without any problems on four home made printers and found it great. I have now got a bee in my bonnet about adding a second extruder to my printer, and after a lot of searching I stumbled accross an eagle design for a sanguinololu add on known as "Slum 1.0.1" this is a reasonable simple to construct board plugging onto the sanguinololu expansion pins, and so I thought that I would give it a try, my problem is how to amend the marlin configuration.h and other marlin files to address the expansion pins and therefore the second extruder. Can anyone help or better still has anyone made and used this design who can provide answers to problems they found.
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