For marinade I put roast in ziploc bag. put bunch of garlic powder, montreal steak spice, cracked pepper, and a small amount of pink salt. put some soya sauce in with it, zip closed. Rub and mix all together. Go out start bradley get it up to 215F. So about 30 min in marinade take out pat dry. Put in smoker till internal temp gets to 155.
Changed up this time just to try. When internal temp got to 150F, I let external temp rise, it got to 227 by the time internal got to 150. I then double wrapped in tin foil. Might off done this time, but I will see. normally try to keep external at 215 until internal 155 then just eat.