Print Boss response times

A client is running a test system with Sage 300 v 2017 and Print Boss (newest version as of Nov '17) in parallel with their production system v6, with an older version of PrintBoss.

In the production environment, checks start printing in 11 seconds.  In the test enviornment, checks start printing in 36 seconds.  This is regardless of the number of checks, number of users on the server at print time.  Sage 300 reports start to print in each environment within a second of each other, so it seems to be related to the PrintBoss check printing only.

We've turned off real-time scanning on the test server to eliminate that as a cause of the delay, but it had zero effect.

Any ideas what we need to do to speed up the check printing?

And I know it is "only" 30 seconds but the users are asking...

TIA.