I have updated the MLDL2000 pages at www.kuipers.to/hp41 with a new version of the manual and the specifications, though the changes are minor. I have also posted the schematics and PCB layout (for Eagle CAD) and the source for the CPLD firmware.
The MLDL2000 is shipping now as a kit and assembled units are in the 'production line'. There are still a few available for those who are interested, but as a kit only (cardreader shell is included).
Meindert Kuipers