Lyle Bickley wrote:
  The CHM Restoration Committee, some CHM PDP-1/IBM 1620
Restoration
 Team Members (including myself) have a G-15 in the "short list" in
 their thinking regarding potential restorations. 
[...]
  If we obtained an additional G-15 from another source,
that would
 certainly be a factor in making such a decision. 
If I recall correctly, the mounting frame of CHM's G-15 is seriously
warped, perhaps as the result of the machine having been dropped at some
point.  That doesn't bode well for getting the drum working.  Getting an
additional G-15 may not just be a factor, but a requirement.
Eric