I still didn't have the guts to try and disassemble the typing unit or the keyboard, but with access to their undersides, I was able to

problems remained, no line feed and no bell. I took the typing unit back out and looked carefully at the area of the line feed mechanism. It was substantially different from the illustrations in the documents.

The punch seemed like it would be almost trivial. It was, _almost_. The punch essentially just bolts onto the side of the typing unit. There are eight small levers that control which holes are punched and there is a large lever that provides the "power". The small levers simply drop into place, connecting with push rods in the typing unit. The large lever connects to a rotating shaft in the typing unit. Here's where the trick is. The lever connects to the shaft via a sleeve. The shaft has holes all the way through it, the sleeve has holes on both sides and screws go all the way through the sleeve and the shaft. There is almost no play in the connection... almost. I took out the KSR typing unit and transferred the punch mechanism to it. I put the KSR typing unit back in, threaded in some tape and tried it. Shredded tape. What??? Everything sure looked OK. The "bit" levers looked like they were all moving correctly, the large lever seemed to be going through its motions. I spent a long time watching it. Finally, I tried putting it back on the ASR typing unit. Shredded tape. WHAT!!! What could possibly have changed? Maybe I attached the sleeve for the large lever to the wrong holes? No, those are the only holes in the shaft. That's when I noticed that little bit of play. Just three or four degrees. That couldn't possibly make any difference, could it? I held the play all the way clockwise and tightened the sleeve screws. Shredded tape. I loosened up the sleeve, held the play all the way counter-clockwise and retightened. Perfect! I moved the punch back to the KSR typing unit and, with my new knowledge, got it attached and working.

After the punch experience, I spent a very long taking exact measurements of the reader control mechanism that needed to be moved to the KSR typing unit. It is a complicated little assembly, consisting of a cam controlled lever that moves based on whether a solenoid is energized and in turn opens and closes a switch as the cam rotates. It looked like the location tolerances of the whole thing would be about a sixteenth of an inch. There is a spring that attaches to the lever and keeps it pressed tight against the cam. I transferred the mechanism. Attaching the spring turned out to be the hardest part of the whole job. The lever end of the spring is "permanently"

attached, but the other end has to thread through a tight space and hook over a small pin that is part of the typing unit frame. I fooled with it for more than an hour. What finally worked was to tie some plastic fishing line to the end of the spring, guide the line to the pin and use the line to stretch the spring over to the pin. I used a piece of "coat hanger" wire to coax the loop at the end of the spring over the pin and then finally reached in with a long thin scalpel to cut the line and pull it out.

"There's the easy part done," I said to myself. I figured I would spend the rest of the day getting the lever, solenoid and switch lined up correctly. I put the KSR... well, now it was really the ASR, typing unit back in and fired it up. The bit gods, or maybe Rube Goldberg himself, smiled upon me. It worked the first time.