...so a sort of follow-up to the original question...

I picked up a set of new shafts with my my rocke arm purchase (private sale, old but un-used parts)...these were somewhat pitted, mostly surface rust, etc, etc...but since I wanted to try my Crane adjustable 1.6 ratio arms I figured I'd clean these up and use them.

The shafts did NOT have the groves...so I marked them out, each wide enough to span the width of the rocker arm, but not so wide that it simply drains the oil out from under the rocker arm. But...I did not grove the shaft sloped (like the pics shown here), instead I simply cut the grove straight across.

I realize this is not ideal, but I figured it would be better then no grove at all since the grove would distribute the oil evenly across the rocker. Tell me though, did I screw them up? Does the straight cut introduce an easy spot for a stress fracture to develop? Should I have left them as they were?

Let's be honest, with a dremel abbrasive wheel there is only so much you can do...I kept the cut shallow, but attempting to cut the grove sloped on that round shaft surface was a NO-GO using a hand tool...