[quote=@Cu Chulainn]
<Snipped quote by 1Charak2>

Modifiers doubled stats? I'm fairly certain that in Fate, modifiers call for situational boosts, and are treated as a Rank-Up, and not an x2, in most cases. Then again, I'm not sure how modifiers are treated here.
[/quote]

If you look at the table of numbers. A single + modifier allows you to temporarily double the stat. (B+ actually being higher then A in a burst) and then a ++ modifier triples and a +++ modifier quadruples. So yea. Because of that and how your luck table works A+ can burst pass all luck checks.

So actually another way of doing it with this info is to basically...

E = 1
E+ = 3
E++ = 5
E+++ = 7

D=3
D+=5
D++=7
D+++=9

C=5
C+=8
C++=11
C+++=13

B=7
B+=10
B++=13
B+++=16

A=9
A+=12
A++=15
A+++=18

This better fits with a plus modifier actually reaching into the rank above with that 'burst' since thats usually when you'd do it on a luck check.

Still it causes an issue so.... heres the numbers again but a bit more sense