I think his question about disk space is the issue that a very active
print server could use a lot of disk space in the spooling process,
which would me a major disaster if it caused the sys volume to run out
of space. As with most Windows server, having two partitions, one for
sys, one for other data, is the best way to go. I would make sure your
print server uses space on the non-system partion. Typically, I allow
myself 1GB of space for spooler usage.

But I agree, there is typically no issue with using a DC for a print
server.