Hi Soren
There was actually 2 use cases here...
1. (This was just the easiest way for me to explain the enhancement request for RunSignup) Create the proper divisions in RSU. Uploaded to RSU from ART and have it computer the divisions winners. This is where not being able to create a division in RSU for a race with a gender of X comes in. Since I can't create a division in RSU specificying gender X there's no way to create the proper division or show it.
2. (This is what I actually did) I downloaded the divisions from RSU into ART. I created a new division in ART using "hidden" as the gender. This would be any registrants with an X as a gender which ART can technically understand as "hidden". I then pushed division bask to RSU overwriting what was there. It doesn't understand it because it's not specifically gender X in ART since there's no way to specify the X as a NB gender in the division creation in ART. So when it uploaded the division to RSU it technically has no idea it's mean as Non-Binary so it just assigns all participants into that division.
Now I could work around this by checking the "Add division results" when uploading results from ART to RSU but then it lists each division as an individual result set and just clutters things up a bit.
Christopher