I will be monitoring this very closely as on the same day, 7th May 2013, I will be flying to New York and picking the same bike as you, Toger 800xc, on the 8th from customs. I will then be riding east to west accross the States & Canada to Alaska where I will start the Pan American to Tierra Del Fuego.
Obviously I am interested in the mods to your bike and how it will fare on your journey.......I had never heard of those pre-filters and have e mailed Uniflow to see if one can be shipped in time. I have put a larger sprocket on the front to see if it will increase the MPG and will let you know.
At some point I will also try to have a thread on this forum but am a technophobe so not as savvy as you younger guys !!
Hope the prep goes well and have a great trip.