I've got my order in for all the WO goodies, so I am reading the instructions (not like me at all) and doing the prep work.
Hi Joe, I understand the concern regarding the 'toothed' locking nuts, the serrations did not look too severe, and the polyester IMAX film is extremely difficult to perforate. I used 3 layers under each end, adding only .024" in thickness. My concern with nylon washers was running out of bolt length, and nylon is a little softer than the film.