Dyna-Glo DGN486DNC-D Large Heavy Duty Charcoal Grill

Anytime is the right time to cook on this heavy-duty charcoal grill from Dyna-Glo. Each cooking grate is made with porcelain enameled cast iron for maximum heat transfer and searing. Customize the cooking temperature by using the adjustment crank to raise and lower the charcoal tray. Reloading or stoking charcoal is made simple by opening the steel access door on the front of the grill or sliding the cooking grates to one side. The smoke stack features an adjustable flue for additional temperature control.

[johnrobinson]

I picked up this grill from a co-worker. I tried smoking ribs and noticed that this grill let heat escape from several locations! I was not happy at all. Any suggestions for modifications before I dump this grill?