Just replaced my gasket for the first time (not a half bad job actually!) and completely cleaned out the cooker. Great feeling!
On replacing the lid I've got mostly great dollar-bill-test results. Back and front of lid - awesome resistance. The left side is tight as a drum, but the right side (looking at the Egg from the front) has a little less resistance. It's not completely friction-less, just not quite as tight as the rest of it. I've jiggered with it everywhich a-way and can't seem to get different results.
Is this a big deal? Any ideas??