[outdated, see update] fischertechnik angular block 45° (Winkelstein 45°)

*2022-02 Update*: I made an updated, better design with [input from Thomas](https://forum.ftcommunity.de/viewtopic.php?f=4&t=7200&hilit=winkelstein) which you can find [at printables.com](https://www.printables.com/model/116744-triangular-block-45deg-for-fischertechnik-dreiecki).

The [fischertechnik](https://www.fischertechnik.de/en) construction toy system has angular blocks with 7,5°, 15°, 30° and 60°. This is the missing 45° angular block. Connecting eight of them in a circular arrangement