i started building my 2010 SJ up as well , then seen the XFS hull and was thinking the same thing , but after talking to Rick and seeing what he had on offer i just ordered a complete Ski off him he has 2 versions XFS or XFR which is the same but reenforced for surf riding and you can choose 2 different engine packages a 850cc or 950cc , also you have the carbon orf glass option .
If you want any info send me your Email address and ill sen i all through
it seamed just easier to buy one complete off RRP and then i still have my SJ to play on as well , so far iv fitted the factory b pipe , airfilters , ride plat , intake grate , impeller , RRP hand poles , fat steering system , carbon bar pad , straight bars , foot holds , new matt , still got the hood straps and pole limiting rope to fit up .
the price adds up reall quickly better off just buying a built ski , ill keep this for mate to use or my daughter to ride :-}