OK, I've started "virtually assembling" this into a frame that can be 3d-printed. If anyone wants to help, feel free to fork and work on it, but please try to do pull requests early and often, so we aren't duplicating work.

The file I'm working on is /peachy_printer/printer_parts/assembled.scad in my fork of the PeachyPrinterHardware repo. I'd love to have something I can print on saturday, when the Urbana Makerspace has open access.