I used a 3/8 rota broach bit - It's a spot-weld cutter. I highly recommend this method. It's easy to tack weld panels back in place. For the price of the rota-broach kit - 70 bucks, its worth it's weight in gold.
You will never see my seams, you will never see my welds. Only I will know they are there.
kinda sneaky? No - just a way to keep if as OE looking as possible.
Dan