Thin-slice (against the grain) your eye-round or have your butcher cut it for ya. Mix up your marinades and marinade the beef slices overnight.
Set your RecTeq pellet smoker to "XTREME SMOKE" or "Lo". Puts it at or below about 180 degrees and works great for jerky
Remove meat from marinade and press/dry the beef. I put between paper towel and literally took a fist and pressed it until I couldn't anymore.
Lay out on a frogmat or jerky grate and smoke for approx 2 hours, checking every 30 minutes until desired doneness