After reviewing the needed info in the Netlist, I looked into both the MicroZed Hardware Guide as well as the Carrier Design Guide but could not seem to find this info.
Of course precise adjustments will need to be made depending on how the signals are routed on the carrier board (internal/external, etc), but just as a 'starting point' or rule of thumb I am wondering what the signalling trace width is on the MicroZed board itself (note, I am only concerned with the signal traces alone that feed out to JX1/JX2, not power, etc).
I do see in the Carrier Design Guide that 4x spacing is recommended, but I am wondering just what trace width I ought to 'at least' be starting out with for routing out my signals, and then work from there.