Then it finally plugged up... I tried cleaning it out without disassembling it, but this did not work.
I then disassembled the hotend to find the plug and remove it. During this I discovered that the wood retainer I had been using was starting to char away.
So I began work on a new design that I had been thinking about for a while. This is based on the BfB hotend that many people like but can be built with only a drill press, hacksaw, rotary tool (Dremel), and belt sander (I plan to post directions soon).
I also found an excellent source for bootlace ferrules.
So far I have done hand push tests and can easily push filament at 165°C.
Now I have to change out my x carriage for larger one (http://www.thingiverse.com/thing:3594, which I already printed before my failure).