Before I assembled the camshafts and gear train, I had to make a small screw that bleeds oil onto the gears. The drawing calls up to use a 2-56 brass hex screw and drill a .006"hole through the centre, I have all the fasteners purchased from Howells, but there is no allowance for this screw. The next best thing was to make one from scratch, so made one from some brass stock with a round head and cut a slot for tightening purposes. The other problem was that I had no drills anywhere near .006"dia, I would even find it hard to see them, so for the time being I used the smallest drill that I had, .020"dia. This will provide a lot more oil, but it all drains back into the crankcase anyway, if it has an adverse effect on the oil pressure, I can always make a new one after obtaining the correct drill, although this is about the smallest screw that I ever want to make. Paul.