Well technically a new frame. Bought a cheap Bird Zero 29 MK1.1. Arrived this morning and parts from old bike all transferred over. The old boost axle didn’t fit (wrong thread pitch) so I pinched one from my son’s bike!
Short shakedown ride this evening and it’s great. Really confidence inspiring but still playful. Was grinning and laughing like an idiot.
In addition to the rear axle I need to get a longer dropper (whatever the Brand-x equivalent is nowadays), add a chainstay protector and sort out the cable and hose routing.