Minifon P55 wire recorder , pocket size of mid 1950s

[Adrian Tuddenham]

Low heat and stretching reduced 1mm outside diameter ptfe tubing down to
.5mm diameter.

That's gigantic compared with the wire diameter. You run the risk of it
hitching in adjacent turns and causing a snarl-up. Don't risk it, knots
are quite good enough.

..Hopefully superglue would have enough binding with the ptfe and
recording wire to make a joint.

I doubt if any glue would successfully bond to PTFE.

(If PTFE is non-stick, how do they get the PTFE coating to stick to
saucepans?)