Dice Roller - New System to Add - DC Heroes
I need to preface this post, saying I don't know anything about the system other than what is stated above.
I am assuming the only reason you would want to stop rerolling is for fear you would get double 1's, and get a total of 0.
From a programming perspective, here is my suggestion. Take it for what it's worth.
I leave it to jase to decide if it is worth implementing.
To simulate #2, I would suggest a dropdown with 3 choices.
1) Never reroll doubles
2) Always reroll doubles
3) Reroll doubles until hit reach a target number
If 3 is selected, you would need to enter a number that would be a stopping point in another field.
IMHO, this would be the simplest way to simulate stopping at some future point.
But I really don't have a horse in this race...