Help! I had a Surly LHT built up in March, it is equipped with a AheadSet SAS 1-1/8" thdls headset which seems to get loose often. When I squeeze the front brake and try to push the bike forward I don't get much movement, however when I go over bumps on my commute I hear the tell-tale hollow sounding tunk of a loose headset. Here's what I did : First I loosened the screws holding the stem on, then I tightened the screw on the top of the headset about 1/2 a turn. This seemed to solve the problem, however I need to do this once or twice a month. Am I not tightening the headset enough? How will I know if I tighten it too much? I have 1 and 1/2 inches of spacers installed also, could that affect the headset? I'm not too mechanically inclined but I'm learning. Any advice for me?