On Sean Collier's bike we are running the forks 1mm down the tubes.
He is also running the 132.5mm linkage arms.
Everybody who has rode it says that they like the way it corners including the Motocross Action Magazine's Wrecking Crew.
They commented that they were surprised at how well it handled on a MX track... Something that the K5 is not known for.
On my Supermoto I'm running them about 5mm down the tubes.
Definitely carves the twisties better...