Thin Z-coupler

Yet another Z-coupler :)

I've [designed one](https://www.thingiverse.com/thing:3670203), but as I've changed my system to fix the motor, I needed to have a thiner one. So, there it is. ;)

It use 8 M3 screws and their nuts. **I recommend using flexible filament.**

You can use those pieces with it:
* [Z-axis motor support](https://www.thingiverse.com/thing:3690345)
* [Combined Z-top and Filament guide](https://www.thingiverse.com/thing:3690354)

**Edit:** After years using it, I've changed to a more conventional design (V2), I've printed in PETG.
Using flexible filament was a good idea but you can't really tighten screws without damage it.