> I'd like to see the same for VHS tapes, there were a number of VHS based systems, be > they arcade Mahjong titles, or 'gun games' for TV that are simply degrading without a > solution.
Not so. Part of the reason why development of the Domesday Duplicator software has dragged on for so long is that Simon has been sidetracked making an updated version of the Duplicator hardware. Specifically, it's a more modular version, which can have multiple ADCs plugged in specifically to handle the case of multiple recording heads, as you would see in a VHS deck.
In fact, at least one person (oln) is working leveraging the existing DdD hardware and ld-decode software toolset to do VHS decoding. While it's not quite yet at the quality level that ld-decode can output, it's getting there. I would really encourage you to get back on the IRC horse and pop by #domesday86 on the Freenode IRC network. I don't really do much but idle in there, but it's fascinating to see the gradual forward progress on ld-decode rev6.