Chris,
Not a problem. However, you may still run into issues if you are trying to use your existing XML file for your CRP500 system with the newer CRP800 controller. Our CRP800 controllers make use of port 2 on the ESS for external inputs, but also use the bi-directional pins (2-9) for a number of these inputs. You'll need to make sure the Smoothstepper is set up to use pins 2-9 on port 2 as inputs for this to function correctly, which is under Plugin Control->ESS Config.
I'd recommend starting with the correct XML file for your new setup. If you want to keep the X as your slaved axis, you will need to change this setting under config->slave axis. By default we slave the Y axis on the newer systems, as we have found this to be more intuitive to most users. Another difference from your existing system is that the slaved axis is the "B" axis in our CRP800 configuration files. This leaves the A axis DRO in the stock screenset open for rotary applications.
The best file to start with for your system is going to be this one:
http://www.cncrouterparts.com/getfil...500_16.1.5.xml
Best regards,
Ahren
CNCRouterParts