While Im not new to grilling, smoking is something Ive not tried yet. Ive always been interested in pit beef and fascinated by the techniques involved. I just bought a 3.5 pound bottom roast thats about 5 inches thick and plan on slicing it for sammiches. My primary curiosity right now is time, and also temps. What kind of heat works best for bottom rounds and about how long should I expect for a medium rare finish? Any input would be greatly appreciated.