I remember a member in here that did one ... not sure if it's the DK or not, but it did look like a real cool mod to make oil changes MUCH easier/cleaner. I have that on my "wish" list ... try a search for it and see if you can find it.
Nobody with the Dk customs set up? Thoughts of oil pressure drop with the extra hose length?
As long as your oil is flowing freely through your filter, you won't see a oil pressure change with a few feet of hose. If you got a kink, the filter by pass would open.