The jib's sheet controls the angle of the jib (sail) to the wind. It is attached to the lower end of the jib that is farthest aft.
there are many ways to rig a lightning. It really depends on what and how it is going to be used. the lightning associations web site has some info on rigging, however your best bet is to take it the...
I believe the term you're looking for is "sloop."
depends how windy it is surfing in big wind--poss 20 kts
The ground