I notice that the Brinkmann Smoke N Grill differs from their All in One by having what appears to be a low-pressure burner and regulator and by heating a pan filled w lava rocks rather than using high-pressure to heat lava rocks on a grid. I would appreciate any comments and observations concerning these differences. I am currently playing w my invention (see "Evaluating Brinkmann All-In-One Thread") and am heating lava rock on a grid w a high-pressure turkey fryer. It has grilled veggies, and I am sure it will work for burgers, steaks, etc. I have no illusions about smoking w it. Ideas?