Hi Scott
While I'm not too fussed on the orange colour you have come up with here
the resolution is pretty tidy! Can you post a bigger file? Just above the waterfall that cascades out of the keyhole there is a feature, the presence of which indicates good resolution particularly if it is sharpley defined. It is a kind of depression in the gasses, like a canyon and shapped like a chefs hat (or kings crown) pointing down at the 7 o'clock position at the head of the keyhole in your image. At the file size you have posted I can make it out ok but I think it would be more obvious at fuller res?
Mike