Seems to me if one is already in the process of placing oil grooves on the flats (I'm in the process) then it might be a good idea to deliver oil to the angles as well. So, say I have a circuit of HSA-1 metering unit, tubing and fitting for each flat. There are six circuits, 2 flats each per axis. Would it be reasonable to cut oil grooves in each angle and hope the circuit could supply both the flat and the angle? It seems to me that there ought to oil to the gib surface as well the opposing angle of the dovetail, for each axis. What do you think?