I've looked at the threads describing use of S-VHS, and it seemed to me to be a bit more involved (the drilling, etc.) and potentially unreliable than I feel comfortable with. You say you've had good luck w/ your Mits deck, but I've got a JVC and, I'm not sure, but it might be a bit finicky in regards to stock.
My main recording usage is dumping HD MPEG-2 .TS files from a computer to D-VHS, and with all the other variables at play that could inhibit perfect layoffs, I just don't know if I want to introduce 'doctored' stock. I have to record at high quality as it stands, to record the bitrate of the incoming streams (1080i/720p), and I'd think the deck would require D-VHS tape to its full spec too. Maybe I'm being foolish, but I'm thinking I'll stick w/ the bona fide D-VHS stock for now.
It does remind me of my long-bygone days w/ a hole puncher turning single-sided Verbatim floppies into double-sided and saving loads of cash on overpriced disks, though. Ah, the 80s.
--BTW, thanks Kirk for that seller recommend. I checked them out and they do seem to have good prices. Might just give them a whirl. Have you had good luck w/ the Maxell tapes?