On Tue, 4 Sep 2001 I wrote:
  Brian Knittel and I have acquired a Kennedy
vacuum-column tape drive
 [...] on rails and rack-mounted, and [...] the way to remove it from
 the rack is not obvious. [...] Can anyone tell us how to get it out? 
We figured this out after a few scary moments (i.e. "Will this fall on the
floor in the next couple of minutes?  Let's find out!") -- if anyone else
ever needs to know, write us!
Thanks,
Norm Aleks