Hi Guys, 2010 yz450 I'm in the process of doing my own fork seals and I'm having trouble opening the damper assembly. I've got a big wrench to undo the top of the fork and it wont budge. Is that even meant to undo? It looks like it has 2 separate nuts on the top, one on the outside and the sunken one on the inside. Am I undoing the wrong one? Why is there 2? I figured the sunken one on the inside is for the cartridge and the one on the outside is to separate the cartridge from the outer fork leg. I'd like to get the proper wrench to do this but I can't find anyone local who sells them.