The guy at leager told me to set the tire pressure, sit on the quad, use a large framing square on flat concrete. So place the square on the ground and touching the front tire.
When there is a 1/4 inch gap at the top edge of the rim you are close. Their are many setting for the type of riding you will do the most. 1/4 toe in is good to. I don't know what type of a arms you have but caster is not adjustable( or was that camber ). This method is easy and good for old or tweaked banshee frames.
What arms do you have?