Thicknesser blade setting

Hi all! Just a quick question for all the woodies who have the know how- how do you go about setting blades in a four blade cutter head on an old Durden? I have been trying to find this info in another thread but can't seem to find the answer.:? I am only new to this forum and love all the different info available but I seem to spend a fair portion of time reading when I really should be working!:doh:
I have only recently acquired the machine and it seems to be well built but the blades were...

Source: http://www.woodworkforums.com/f154/thicknesser-blade-setting-157893/

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