Had the Corsa exhaust installed today. 4 hour round trip, only just realized passanger side is out about 1/8 inch.Tried calling the tech but he was gone for the day. I know this is getting picky, can i just remove the drivers side sill and shimm it out. The exhuast was tack welded. I know he did not use any shimms on the exhaust, thats my reasoning for bumping out the drivers side. Sorry for the long explanation.