aligning the brush hoods to suit the cocked brushes is the best way to do, but before you start you shuld slightly enlarge the holes (in the metal only!) that the spring posts bolt through. Learn from Big Jim , he's a legend!
Dont waste your money on the Niftech one like I did. Like antoniop said, you need both. One to do laydown and one to do standup at 25 bucks a pop!!!!! The Racers edge one will do both for probably around $12.00 or so.