G'day all just thought id share this with you...........horn button popped out one of the legs broken off, oh joy, as most will know cant buy just the button and $140 for the kit is rather steep so worked a fix. Had one of those pens with 4 colours in it sitting with me noticed how similar the pocket/paper clip on the pen was to the leg of the horn button. Carefully trimmed the peice from the pen matched it to length of other horn button legs then using 2 part plastic specific super glue attached the new leg and all works fantastic, and the pen still works aswell............bonus