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------------------------------------Posted by: Mark Lerman <mlerman@...>------------------------------------Be sure to visit the group home and check for new Links, Files, and Photos:http://groups.yahoo.com/group/Homebrew_PCBs------------------------------------Yahoo Groups Links<∗> To visit your group on the web, go to: http://groups.yahoo.com/group/Homebrew_PCBs/<∗> Your email settings: Individual Email | Traditional<∗> To change settings online go to: http://groups.yahoo.com/group/Homebrew_PCBs/join (Yahoo! ID required)<∗> To change settings via email: Homebrew_PCBs-digest@yahoogroups.com Homebrew_PCBs-fullfeatured@yahoogroups.com<∗> To unsubscribe from this group, send an email to: Homebrew_PCBs-unsubscribe@yahoogroups.com<∗> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/