Even on the 7200, whether or not the radio is a select, scan, or system model is NOT determined by the feature string.
If I knew the command line parameters to change it around between select, scan, and system models, I'd give you that information privately.
But I don't have it. Sorry.
Yeah, the OMAP radios are different. They're much more likely to get bricked even when you do everything right. Kinda smells like garbage to me. At least when you brick one just by trying to edit the personality, you feel that way.
I have an M5300 in a CS7000 console that is in LOST MRU. Bricked by an untouched laptop installation that was working just fine previously.
That's pretty stupid.