It seem to me that a air screw adjustment knob is just about a must on a long ride.I thought about buying the type that was in the forums awhile back but the tip of the screw looked different than mine.So I modded mine by attaching a slotted bit out of my tool box to the orig air screw.I roughed up both pieces with sand paper and used 1 drop or less of super glue to hold it in place and align it.After that was dry I coated the fat sides of the bit with JB weld and cleaned it up with my dremel tool after it was dry.Wait 24 hrs.Now I'm learning how to find that new knob to adjust it on the fly.Ok,maybe on the crawl.