[Ernie]

There are solid plastic “washers” that I have used to raise the gasket. They are a little larger than the gasket and about 1/4 inch thick. You may need a couple to compress the gasket on the commode. The 320 comes with the gasket in place. There is an up and down side to those -if you have to remove it. When you get the whole business lined up, the toilet will rock, until you tighten the nuts back down.