I have a Marzocchi 66VF 150mm fork. I want to change it to a 170mm but when I disassembled it, there were no spacers for me to move. I realized after I took it apart that it doesn't have an internal adjustment to make it 170. Is there any way to change the 150mm to a 170mm? Anything I can buy to make the change or do I have to buy another fork?