<I've tried 4, and all 4 have failed...  I got a RD33 to work from the RO

I presume you meant rx33.

<I have a couple more drives to try...
<Is there any special mod required (BEsides a new format) to get ex-PC dri
<work in uVAXen?

TEAC FD55G series work.  Thats a 1.2meg dual speed drive.  The jumpers
must however be correct and deepending on model there are jumpers for 
speed select and write current and all (there are others) must be 
correct.  Sorry I don't have a list of all of them.  If the write current 
jumper is wrong write errors will be a problem even though it can read.

Allison