I'm surprised I can't find anything online about this but it appears
to me that, once you have fitted DROs to an Sieg C3 based lathe, it's
impossible to take cuts shallower than about 40 degrees.
With the compund DRO towards the front, it clashes with the cross
slide DRO and with it towards the rear, it clashes with the
A somewhat significant design flaw I would have said.
I wonder if AET would send me the parts to retun it to vernier dial
11 years ago