[kalee20]

Definitely make yourself a de-reeler, a wooden frame to hold the reel horizontal, a rod going through the centre of the reel of wire, and a couple of ball-bearings so it goes round without friction. 0.04mm wire breaks easily!

And as the former is square, the wire tension will pulse four times per revolution of the former, as it goes round the corners. So you'll need to make a fishing-rod like guide out of thin springy piano wire, to absorb the jerks. Otherwise you'll need to wind super-slowly so that the inertia of the reel doesn't keep snapping the wire at each jerk.

Use a temperature-controlled iron to solder this wire, set as low as you can, and practise soldering it! Wire this fine dissolves fairly readily in hot solder, you will be surprised!