ok FIRST OF ALL I HAVE BEEN READING UP ON THE 16 TO 17 INCH SWAP FOR THE 99 900 AND IT MAKES A LOT OF SENCE TO ME BUT MY PROBLEM IS MY 900 CAME WITH A 17 SWAP ALREADY DONE AND NOW I NEED ROTORS WHAT ROTORS DO I NEED BECAUSE THERE ARE NO SPACERS BEHIND THEM ANY INFO WOULD BE GREATLY APPRECIATED