Duodisk analog boards: are all versions interchangeable?

[Andrew Weller <awweller@rochester.rr.com>]

I have a Duodisk I received as part of a used Apple IIe system.  I
bought the system to make images of some old Apple II 5 1/4" floppy
disks (from when I owned an Apple IIe system many years ago) that have
sentimental value.  I read about the problem with Duodisks ruining
disks under certain conditions, and, not wanting to take chances, made
the necessary modification to the Duodisk analog board.
Unfortunately, in my overzealousness I accidentally scratched it.
While Drive 1 seems operational, the speed of Drive 2's motor varies
wildly.  Despite Drive 1 seeming to work properly, I still do not
trust my disks to it.

I found a dealer selling Duodisk analog boards for a reasonable
price, but I am unable to tell from the description whether I can
safely substitute the board I would be buying for the board I
currently have.  Here is the description:

	661-92130	Drive Analog Card DuoDisk

On the board I have is no such identifying number; instead are the
words "DUODISK ANALOG" and the number "676-[]101-[]" (where "[]" is a
filled white box).  I have learned from reading past articles at
Deja.com that these are essentially revision numbers (with others
being "-[]102-[]", "-[]107-[]", etc.).  I wish to know:

	(1)  Does the number given in the dealer's description
	     identify Duodisk analog boards in general, so that if
	     I were to order one, I might get any revision?

        (2)  Does it actually matter which revision I get, or
             do they all have the same "interface"?

Thanks in advance for any replies.

-- 
Andrew Weller
awweller at rochester dot rr dot com