So, along the same lines of cleaning the flame arrestor, do any of your guys do anything with the PCV valve? I believe in the manual, it says to either clean/check/replace (I don't have the manual right now, so can't remember which) at 100 hrs. Do any of you guys do anyhting with it? I see that it's probably a fairly cheap thing, so if you do replace it, it won't break the bank. Any thoughts?