No, that didn’t work unfortunately.
The image in the HMD appears to be rendered Upper and Lower rather than SBS therefore the image is split vertically.
If I press F5 the image flashes what appears to be a correct image but it’s only a flash.
The steamve.vesettings file only contains MirroeViewGeometry 0 0 540 960. I suspect this is the dimensions of the SteamVR mirror display.
What Pimax resolution settings do you have and also what is the video resolution setting in the game config?