Give carl's a call, they have done a couple......my riding buddy has a dragon 860..full carls treatment probably 22K in it, can't sell it. He also has a 2012 pro with slp stage 4...since he got the pro the dragon just sits in the trailer as a spare. We ride hard and to be honest the pro is a huge step better than the dragon chassis wise, even with the 860,race gas,race twins + holz carbon fibre everything the pro stg4 does better in every case except flat drag race (that we don't do)
Do your self a huge favor, sell the dragon and get a 2013 pro and go from there....IMHO
Of course the other side is if you like your sled now the 860 would make it pretty much bullitproof for the coin