Thanks to those who replied.  Knowing that I can
swap freely will make them even more useful.
(Thanks to Roxanne who brought these to my
attention some time ago.)

One comment below:

-----Original Message-----
From: Bob Chapel <[log in to unmask]>
<snip>
>....one problem...the other brand does not appear to fit
>or run if placed in the bay containing another brands receiving bay...I
>don't know if this is common but in the future I plan to purchase only
>the same brand so all drives will be swappable withing all of my
>machines.


The guy who sold me these (at National Computer in Wichita) warned
me that not only will these not be interchangeable among brands, even the
same manufacturer makes different kinds that are not interchangeable.  I
suppose that if you want to use these, you should buy a few spares of
exactly the same kind.

Dean Kukral