Free Throw Mechanics

[RookieDude]

Would some of you please explain to me your mechanics of a free throw. From both the Lead and Trail position.

For example: How do you signal for the bonus (1&1) when you are the Lead and your hands are full with the ball?

The Trail: Do you signal one shot, 1&1, or two shots with your hand briefly before the shooter shoots, or do you keep your hand to your side continually utill the shooter shoots?
I know I have been told to raise my hand on the last shot, "as the shooter shoots", to prepare to "chop" or start the clock on a miss.

Do you signal the score keeper on a made free throw?

Do you slide step toward the basket on the last shot of a free thrower?

Do you flick your hand, opposite side of the shooter so as not to distract him/her, for your 10 second count?

Also, I know the book says not to signal on a made two point field goal...but in my experience it is a lot less confusing for the score keepers, coaches, and fans if you signal two on a made two-point field goal that was close to the 3 point line. (Not proper mechanics though)

Thanks for your input.