[MapProxy] Difficulty setting up Custom Projections

[Marc Harter]

I gave up on that and edited the epsg file under the pyproj folder (in the venv) and the server started fine.  However when making a request:

... "GET /service?SRS=EPSG%3A103930&LAYERS=polk&FORMAT=image%2Fpng&TILED=true&TILESORIGIN=144243.59%2C32764.71&TRANSPARENT=true&WIDTH=512&HEIGHT=512&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&BBOX=351651.50940741,32764.71,559059.42881481,240172.62940741 HTTP/1.1" 200 2557 ...

I get "unsupported srs: EPSG:103930" on all the tiles.  My guess is that change didn't take?  Or could there be something else I'm missing:  The service.yaml config is:

    - polk:
        md:
            title: Test
        param:
            srs: 'EPSG:103930'
            res: 'sqrt2'
            tile_size: [256, 256]
        sources:
        - type: cache_wms
          req:
            url: http://server/WMSServer?
            layers: 0,1,2,11,14,17,18,26,28,29,30,32,33,34,35,36,37,38,45,46,47,48,49,50,51,52,53,54,55,56,57,61,67,68,69,71,73,75,79,80,81,82,87,88,90,91

See anything wrong or something I may be forgetting to check?

Marc