Morning Raed; I think those are solid for now.
I would buy a gasket to go around the lid. Glue it on with some high temp RTV. The gaskets are available at hardware stores, home depot etc and online at
amazon. As far as the bottom end, I think I would do it like that to be sure it works the way you want it to.
Have you done any mods to the charcoal pan? (grate in the bottom, air holes)
If you like the legs off method, maybe get some patio blocks or something to put down so you don't have to seal around the bottom?
I don't suppose you boil checked the thermo before you bolted it on? The one I put on mine is still 25 degrees off... not a good mod for me. I bought the maverick ET-732. Best investment for a mod that I made. Gotta know the IT of the meat, cause that matters the most.
Also, don't overload the charcoal pan, otherwise you will go through the roof on the temps.
Keep us posted. What are you smoking?
mine:
gasket, vent/damper (leave wide open) and after market thermo
foiled water pan with foiled smaller size cobble stone, instead of water
grate in bottom of charcoal pan, 4 holes drilled below grate on each side to allow for pan to breath and allow air up under coals.