ok, I just tore out the old loose ball head set, and installed a shimano 105 theaded headset. now here's the issue, once I have the "upper head cone housing" screwed on, I don't have enough threads to put on the keyed washer and lock nut, yeargh! so my question is, could I survive without the lock nut? Maybe if I were to put some lock tite on the "upper head cone housing"? or maybe there's a headset that isn't as tall that would work? and if it helps above the "upper head cone housing" there's about 2.5 threads showing about the height of the keyed washer.