Unusual key combination

Hi there. I would have thought what I wanted to do was simple but I cannot, for the life of me, get it to work. I would like to have a hotkey trigger the action: Option+E+MouseScroll. I've tried a 3-part action where I do Option+E (press and hold), MouseScroll, Option+E (release) but nothing seems to work. Anyone have a clue how to have one of the modifiers be the letter e? Thanks!