I am an airframe mechanic, and have to drill stainless and titanium on a daily basis, so follow these steps. Mark your hole center with a Sharpie. Hit your mark with a good pointy center punch. Use a good quality #30 or 1/8" cobalt drill bit (not one of those p.o.s. gold colored titanium coated ones from Harbor Freight) and drill your pilot hole. I like to use BoeLube, but any good cutting fluid or bee's wax will work, and drill at a medium speed. After your pilot hole is drilled, step it up with a quality Unibit (again, NOT one of those cheap titanium coated ones). If you haven't purchased one, I HIGHLY recommend you get a 13/16 Greenlee punch (and yet again, NOT a cheap Harbor Freight knock-off). On Ebay, one will run you about $60, but worth every penny. I, too, purchased the Concord pots on Ebay, and had no problems punching three holes in them.