File1325706234.jpg-(750 KB, 1545x1000, ladderWTestLOWFI.jpg)
About Jacob's Ladder, read the instructions there in the sheet. It -should- in theory be easy, and it's very easy for me because I've done it so much.
Basically, you have to frame everything in terms of opposing forces. Easiest example: armwrestling.
You got Joe with a STR of 5 armwrestling James with a STR of 3.
What you do is put one end of the ruler on the big 5 on the left, and the other end on the big 3 on the right. Notice the ruler crosses the diagonal at 6? That's it. Joe needs to roll 6 or better in the D20 to beat James.
It doesn't matter who rolls. You connect the big 3 on the left with the big 5 on the right and then have James roll instead. Use the smallest scale that fits both Might and Difficulty, because the smaller the scale the easier is to set the ruler.
Might is simply the sum of Trait plus Skill, if any, plus Item, if any, plus Bonus, if any.
Difficulty if the other guy's Might, or, if it's not a guy, then it's whatever you think fits (the sheet has difficulties on the right).
Say, you have a thief balancing over a fence slick with rain. Put his AGI plus "Acrobatics skill" if he has it, plus "balancing pole" if he has one vs say, a 12 for difficulty.
<-- This pic shows some test lines to make sure everything matches.
As you can see, equal forces have a 50/50 chance, unequal forces have different chances, proportionately.