I happened to be at the mill while he was attempting to chicken scratch the last couple of splines, was using a mild steel cutter rather than a carbide or ceramic and was using an auto table with a manual indexing wheel, and was making his adjustments with a sharpie. Even being heat treated chromoly the right tooling and index setup would have done the job in an hour tops. I am just going to chalk it up to an inexperienced machinist since the true machinists were busy on the CNC machines with internal boring and internal thread cutting on aircraft parts.Splines are often case hardened after getting are cut, so that may not be that easy. Actually where you want new splines may not be hardened so if they are just cut they may not be as strong as the normal splines.
it was all just a attempt to get the jeep off the rack and moving while waiting for my custom shafts to be built