Yep, they disappear for days. Out with friends-fishing (my a$$) out getting high! Then home they come-tired-sleep for a couple days and then off again. Well, thank goodness I no longer have to put up with any of it. Tweeking-I had to get manuals out to try to put things back together. Friend is working on getting my commercial weedeater back together (for a long time now) it was new in the box.