I don't think this poses a problem. I have a B&K Ref 30. It has a RS-232 port on the back that can be used for setup and control, but not software upgrades. I just upgraded the software this weekend from 2.05 to 2.08 by replacing an eprom. This took only a minute or two longer than it used to take me to upgrade my Sony TA-E9000ESs software using the RS-232 port.