IBM I/O Selectric project

I've been working on an IBM Selectric typewriter which I bought earlier in the year. It is the I/O Selectric type 735 which differs from a normal Selectric in having the solenoids and switches on it to allow it to be used as a printer and keyboard. When I got it the motor wouldn't run, and the mechanism was jammed. The motor problem was its thermal trip, which is meant to be the resettable type, so I replaced that. I gave the whole thing a clean with degreaser, which freed up the mechanicals, then oiled and greased it. It then worked happily as a typewriter. I have made a small interface, based on an Arduino Mega 2560, which provides a serial port. Currently this only supports printing, but will be extended to include the keyboard. It uses almost all the digital I/O on the Mega (15 solenoids, 27 contacts.) There are still some adjustments to be done, and I am awaiting a set of Bristol Wrenches (Keys) so I can safely do these. I have tried using Torx and Allen keys, and while they can be made to 'fit', it doesn't seem like a good idea. There are some pictures and videos of the typewriter here: http://www.flickr.com/photos/ljw/sets/72157632841492802/ You can get the Arduino interface code here: https://github.com/ibm2030/IOSelectric I haven't yet documented the hardware I used for the solenoid drivers, but if anyone is interested I can put some notes together (basically: Arduino output to 2N7000 FET buffer to ITS4140N +48V high-side driver on the output side, and a simple 250R pullup to +5V on the input side.) Manuals here: http://bitsavers.informatik.uni-stuttgart.de/pdf/ibm/typewriter/selectric/ (or other Bitsavers mirrors) Info on the Mega2560 here: http://arduino.cc/en/Main/arduinoBoardMega2560