Leadnut adapter for RoBo 3D trapezoidial Z-axis threads Tr8x1.5

This is a mod that allows you to change the Z-axis threads (either imperial or standard metric) to trapezoidial threads (from https://hfbshop.de/, german only -- sorry).
As those rods come with nuts that have a a 17mm wrench size you'll need this adapter to make it fit in the 13mm holes of the X-Z axis brackets.

NOTE: Depending on what your previous rods were (e.g. M8x1.25), you'll need to adjust the steps per mm in your firmware, otherwise your objects will be too large in Z direction.