Looks like you have some more whittling to do Bob . Looks like the outside edge is too low . so it will look better and straight across . I would plane it down where the mirror base is sitting . The curve against the body looks good .
I just can't live long term with that huge gap between the glass and body so I'm holding out for a stock replacement For now it is nice to have some visibility rearwards on that side of the car. Cheers Bob