Both of mine are welded in. Never had a need to get below the RF baffle to do any cleaning, but I suppose you wouldn't have to weld it in if you were able to get a good seal all the way around.
Team: [B]Smitty's Real Pit BBQ[/B]
[B]Superior SS-3[/B] - Courtesy of Gainesville Jaycees and Superior Smokers
Custom Built Reverse Flow Stickburner
[B]Weber[/B] 22.5" WSM
[B]Weber[/B] 26.75" OTG
[B]Weber[/B] Blue 2000 Stainless Performer
[B]Weber[/B] Red 1998 Stainless Performer