You haven't had the courtesy to respond to my question, so I'll volunteer this.
If I sometimes seem to be stating the obvious, it's because people sometimes seem to be asking it. Otherwise, I'm happy, even keen, to acknowledge that there are proper experts on here, from whom I've benefited enormously - thanks are due to them. However, your sneering suggestion that I don't look after my bikes myself [and perhaps that in other ways I'm not authentic] is, I'll admit, irritating.
For the record, I do look after my six bikes, one of which I rebuilt from burned-out, rusty frame up, and repair and maintain them meticulously. I also look after, service and repair our four-wheelers, too. It's my hobby: why would I be dishonest about it?
Happily, in the real world, I have many friends who know who I am, where I am and what I do, so your attitude remains simply irritating - an irritation I intend to avoid in future.