I found the extra depth in a Q5 really helpful.  I had 2 KDA50's and 40
ports worth of DZQ11's in mine.  Every rear panel hole had something in it,
and the space behind the rear panel was _stuffed_ with cabling.

In fact, the original version of rtty, my console server package, was
written for an Ultrix Q5 which started its life as a KA630/16MB and finished
as a KA655/32MB.

My knuckles were undamaged by the Q5, due to the thickness of the bandages
from my prior experiences with an 8650 (the last true VAX).