Flare Positioning

[Ferrino]

When welding steel 930 front flares onto 911 front fenders, is there some adjustability in the lateral distance of the flare "lip" from the body? I'm talking maybe making them 1/2" more narrow on each side to suit some specific wheels/tires. I understand that this would impact where it mates to the front bumper, but let's assume the bumper (fiberglass) would be adjusted to match.

Thanks!