Hmmm...  I have done the crystal swap, but with no luck.  I had a few 6Mhz crystals and ordered 22pf caps, built the circuit, checked it thrice, and nothing.  It just won't come on when the switch to the 6Mhz crystal is flipped.  It turns it off and the unit won't power up when the alternate crystal is selected.

I have made it go into a crazy oscillation followed by a spectacular crash...once.  Any ideas?

The 5ths switch is brilliant!

Keep up the fine work sir.