400ex lowering

[thumpinex]

hello was wondering if anyone could rec. a drop distance for the rear of an 03 400ex for flat trac.......was looking at the adjustable ones but dont trust them completely lol. so i figured id make one on the mill at work that was the right length. just needed to know if anyone knew how long there kit was all set up because i cant figure out how much the shock will move as i extend the linkage
........thanx a million