Re: DigiComp People who's names are lost to time wrote: Docs are available at http://galena.tjs.org/digicomp/ It's molded plastic, but not quite as simple as cut sheet. Also, the clocking is propagated by bent metal rods. I remember having to fashion a replacement rod that resembled a squared-off question mark (lower right side of rear view on page 3 (http://galena.tjs.org/digicomp/p4.gif)) I suppose that if you had one example of all the parts, you could manufacture replacements, but having used one myself, the tolerances would have to be in the vicinity of one or two 18 gauge wire diameters or else the logic would be too sloppy. If I were going to build one for myself from scratch, I'd probably try to make one out of aluminum and grease it with graphite. I don't know if anybody out there has every worked with die-cut cardboard, but it might be possible to set up a jig to stamp them out of thick (~1 mm) fine-grained shirt cardboard. To make a die-cut jig, you stick strategically placed razor blades in a block of hardwood, and at the corners, you glue down small (~1 cm2) foam pads to help clear the product out when you release the pressure. It would be easy to check for tolerance - the real plastic part should fit neatly into the outline, but not fall down between the blades (resting just inside the cutting edge) I don't guarantee weeks and weeks of use with a cardboard DigiComp unless you soak at least the clock end in some sort of epoxy or adhesive to plasticise it. I, however, do not have a DigiComp to replicate. Anybody else? Disclaimer: I'm not a mechanical engineer, just an amateur woodworker. Take these hints and observation as the free advice they are. -ethan