Random rules question.

You are only allowed to reroll a die once, but can you change a rerolled die?

Weapons guidance allows you to change a blank to a hit. So if I combined that with predator or howlrunner could I roll 2 dice, reroll one blank, then spend my focus with weapons guidance on it if it rolled blank again?

Yes, you can modify rerolled dice; you just can't reroll them.

Only one reroll per dice. Beyond that you could perform any number of modifications BUT remember that any given modification could only be performed once.

Say you have a Focus and TL token on the guy you shoot at. Say you roll blank-blank-eye-boom. What happens next may depend on how you spend your tokens. Spend the Focus first you change the eye to a boom but if you then spend the TL to reroll the two blanks if either one of them turns up an eye it not stays an eye because you've already spent your Focus; if you has spent the TL to reroll the blanks first and THEN spent the Focus token any new eye results would also be changed.

Thanks!