I am wanting to grill and chuck roast to med rare. Am I going to be disappointed?? Will it be too tough? It's my beef, which for the most part is tender, corn fed beef. I have read about several marinades consisting of red wine vinegar, ketchup, soy sauce, worchestersire, etc. and marinate for 6 hours. Thoughts? Should I cook hot and fast to med rare, or set it off to the side and cook it for a couple hours? Don't really have time to fire up the smoker tomorrow so looking at grilling. This is for dinner tomorrow night. Thanks!