Fixed my door knob! It's been loose for a few days but tonight it came off in my hand! Fixed onto the spindle with a grub screw recessed deeply.
The old one comes out by drilling and a first for me, extracted the rest with an easy out.

Next I needed to turn down an M5 bolt to fit the spindle but seeing as I don't have a lathe I ended up with the pillar drill and tooling in the dremmel.
Second attempt

Not flush and certainly not recessed but it's functional

The old one comes out by drilling and a first for me, extracted the rest with an easy out.

Next I needed to turn down an M5 bolt to fit the spindle but seeing as I don't have a lathe I ended up with the pillar drill and tooling in the dremmel.

Second attempt

Not flush and certainly not recessed but it's functional
