Had the problem (again) of my speedo nylon nut thing rounding off. I got another, replaced it., all working...lovely! However....when i glanced down at the speedo the other day...no speed! took it apart again, only to find...nothing, the nylon thingy has disappeared! No idea where it went, or how it went there. Anyone else had this happen. I can't think how it got loose as its a pretty tight fit in there. Looks like I need a new one....AGAIN.