Thanks for that. I made it work.
I took the lid off the Blaupunkt, removed the CD transport, and drilled out the "fake" ISO mounting holes to approx 7mm. I then used M6 bolts along with nuts on the inside of the chassis. Yes, I
bolted my unit to the Scosche.
I wish I'd had some way of knowing that Euro-DIN won't work with the Scosche, but I see nothing on their site about this.
All seems to be well. The only other hang-up occured when I saw six(!) leftover wires hanging out of the Scosche HA10B wiring harness and had a panic-moment. I eventually realized that there are 8 speaker wires and 3 power wires and nothing else on my low-end unit. Not dimmable, no tele-mute, and no power-antenna on the car. Cool.
I do wonder which three were the factory AUX jack. It would be nice to splice that into the Blaupunkt line input so I can keep using the factory AUX jack.