The version that comes out when I use ``prepare_deploy.py`` includes warnings like 
```
WARNING: FITSFixedWarning: RADECSYS= 'FK5 ' / Coordinate reference frame 
RADECSYS is non-standard, use RADESYSa.
```
that's fine, but maybe you should add a sentence above or below saying something like "If you see warnings about a non-standard RADECSYS, don't worry about this - the WCS will still work, it just doesn't fully conform to the WCS standard."