[rescue] 3.5" floppy drive question(s)

[Curtis H. Wilbar Jr.]

Was wondering if 3.5" HD floppy drives can be jumpered/used in
a system that only supports 720K, using them as 720K only
drives ?

I only own one 720K floppy drive (wouldn't mind a few more).

If that is possible, and only possible with some drives, anyone know
if it is possible with any of the following:

Panasonic JU-257A827P
Panasonic JU-256A216P
Sony MP-F17W-09 SMM
Samsung SFD-321D/T
Epson SMD-1300
TEAC FD-235HF

Also, anyone know if there if it is possible to slow the spindle speed
so that 1.44M can be done on machines that only have DD data rate ?
(and if so, any of the above drives capable of being slowed ?)  Would
that even work ?

-- Curt