Telescoping backscratcher

I had an itch. By the time I had made this, the itch was gone, but I'll be ready when it comes back.

The total length when extended is about 39 cm. When collapsed, 13 cm.

For best results, print vertically, all at once. If you separate it into different pieces for printing, you won't be able to put them together.

Update: I made a version with a wider head. https://www.thingiverse.com/thing:3125608