Options: Self-Control and Unreliable

Roll	Unreliable	Self-Control
4	-100%	x2 1/3	x14/6
5	-80%	x2 1/6	x13/6
6	-65%	x2	x12/6
7	-50%	x1 5/6	x11/6
8	-40%	x1 2/3	x10/6
9	-35%	x1 1/2	x9/6
10	-30%	x1 1/3	x8/6
11	-25%	x1 1/6	x7/6
12	-20%	x1	x6/6
13	-15%	x5/6	x5/6
14	-10%	x2/3	x4/6
15	-5%	x1/2	x3/6
16	-1%	x1/5	x1/5

Unreliable & Self-Control
For some extra granularity it's easily possible to add additional levels of the limitation Unreliable and disadvantage Self-Control rolls. This can allow you to exactly specify the target roll or can come in handy when you are buying off the limitation or disadvantage, allowing you to buy it off in stages. Unreliable-11 goes from -20% to -25%, other values are the same for both. If you are converting over to this system and someone already has Unreliable-11 I'd suggest you let them get Unreliable-12 for the same limitation value (in effect, giving them a bonus).

Resistant
Additional levels of Resistance may be available:
You have +14 to HT rolls to resist: x4/5.
You have +12 to all HT rolls to resist: x2/3.
You have +10 to all HT rolls to resist: x3/5.
You have +8 to all HT rolls to resist: x1/2.
You have +5 to all HT rolls to resist: x2/5.
You have +3 to all HT rolls to resist: x1/3.
You have +1 to all HT rolls to resist: x1/5.