Quick post — installed the Peterson Engineering EZ Focus Kit.  This kit makes the coarse focuser knob work a lot finer (to the point of not needing to use the microfocuser as much).  The mirror lock stopped turning easily so I spent an hour talking to Pete Peterson and we troubleshot the mirror lock issue.  Seems to be working okay now but waiting for a clear night to really test it.  Also made a Hartmann Mask out of poster board.  This uses diffraction to assist in focusing.  Check out my links for websites on these items.