I read a couple different walkthroughs and some suggested putting the bottom gasket on the bottom of the center piece instead. Just put it under the bead or bump above the flat part that goes into the bowl. I agreed that would make a better seal. I just put the pieces together. It's a really snug fit to get the center piece onto the bowl. The bowl has been outside all night and is cold. Will probably fit better when warm and when the gasket gets compressed a little from use.
I am going to fire it up this weekend (even if I don't have something to cook on it but that gives me a reason to get something) just to test it out.
Terry - KCBS member
LSG 24"x30"x36" Vertical Upright Smoker with Warming Oven
Weber Smokey Mountain 22.5" - Weber Genesis S-330
Pitmaster IQ-120 - Thermapen - Maverick ET-733
For info on any mods I have done to my WSM, please see this post