Just tried it out on two 5.25" drives, neither of which work
One was an NEC FD1157C (Dec 1987!) which did seek to track 83 but refused to read anything, and unlike a 3.5" drive I tried earlier, behaved the same with and without a disk inserted. Luckily this is already listed on your page of supported drives, so it must be a problem with the drive. I will test it in a PC and see if it behaves any different (only found this drive two days ago in a dumpster so perhaps this is no surprise.) Slow firmware didn't help.
The other drive is a double density unmarked drive. Warranty sticker seems to indicate manufacture date of 1987. PCB has "F561MB-02" on it. Cast iron base has "T P C, Made in Japan" moulded into it. The -c2 command failed on this drive (head loaded then unloaded) but using the slow firmware the head did seek all the way in (then made some clicking noises like it was trying to seek further than the head could physically move) but still returned the usual failure.
EDIT: Just tried a Panasonic 3.5" JU-257-204P and again it did seek to track 83, but I couldn't read anything (this is from the same dumpster as the first 5.25") Will have to do some more investigating when I can dig out an old PC and a known good drive, but unfortunately it's getting late...