droop is usually zero, the inner screws are for up travel, I have been running it with the screws contacting the chassis when the chassis bottoms out. the outer are for camber as stated above. the aluminium washers on the kingpins are for ride height. toe will change slightly with changes to ride height, so watch for that as it isn't extreme. I set the spring collars so that with no weight on the wheels the collar just touches the spring plus 1/2 to 1 turn. I also removed the plastic sleeve with the o-ring around it that sits between the chassis and the spring post, it seems to prevent bending the screws in a crash.

Scott