Homebrew PCBs

I finished the MCU version. The only real advantage is that you can 
hold the carrier in place firmly against the input rollers, then 
press the Continue (X) button on the printer. The printer will pause 
for whatever time you program it for (I use 1 second) before 
attempting to pull in the carrier. This gives you time to be sure 
everything is centered and square. Also, if it doesn't "grab" the 
carrier you don't have to remove the carrier - just press the button again.

The mechanics are a bit simpler - no exit sensor, simpler center 
bracket. The sensor is a reflective IR sensor.

The downside is you have to buy a sensor and either make or buy an 
mcu board. You can use one of the Radio Shack "breakout" prototype 
boards (stock # 276-159). I should be able to get everything online 
by Friday or Saturday.

If I had a head count of anyone who wants one I could probably supply 
a very simple 'kit" of parts for a modest sum.

Mark