At the risk of going off topic, did anyone ever try the HiDensity driver?
http://aminet.net/package/disk/misc/HiDensity
Its been 20 odd years since I last tried. In my case it did kind of work, but was very unreliable in that it world appear work fine until you reset the computer and then the disk would not read any more and would need to start over.
Maybe there is something to this driver which just needs some more work to make it more reliable and useful.