Epson HPIL interface

FWIW, the HP service manual for the 82906 (but not th 82905) is on the Australain museum site. It states it was OEMed by Epson and also says the case parts are HP-specific (presumaly due to the colour). The HPIL interface (HP product) that I have had a light grey connnector panel on it, presumably that was the colour of the case mouldings for the HP version. I would be interested to know what printers used the same electronics. The 82906 mainboard contains an 7810 and a 8042 IIRC, which makes it later than the IBM 5152 (which I have the schematics for of course). That uses an 8048 and an 8042, I suspect the HP82905 does likewise, but that's the sort of thing I'm trying to discover... As an aside, does anyone know which Epson model was used for the IBM 5152? Is the TX80 the one with the large 2-pitch leadscrew to move the printhead? Used in the CBM 2023 etc? I think I have at least one spare mechanism and spare PCB in the spares box. -tony