d20 Yahtzee

Connie and I were playing Yahtzee last night and ended up talking about playing with different dice. Of course, the Bag o’ Dice came out, and I started thinking about how a game of Yahtzee would go played with d20s.
Well, I wasn’t the only one, and a Google search brought me to this page with rules and even a score sheet for d20 Yahtzee, or “Yahtwentee” as he calls it.
I decided to turn his PDF score sheet into a Google spreadsheet (d20 Yahtzee) with one minor fix to the bonus score threshold for 1-6’s.
I think I’ll have to try play testing it tonight.