You know, I'm feeling compelled to reply to this thread. Good thing or a bad thing? Haven't decided, yet. I suppose that means I'm officially in the "older fart" category. Sixty-something, more or less.

Can't claim to have a stable of bikes anything like most folks. Have one I use frequently, one that's been put-up until upgrading, and evaluating having one built. (Which is about N-12 for many of the members here.)

Looks like you're having fun with those bikes. Those will certainly take you places in a hurry. Mine are more of plodding commuter types, by comparison.