Proxxon mf70 backlash

Here is a tool to eliminate backlash form the Proxxon mf 70.
The Proxxon MF70 has just plastic Nuts and it is not possible to install
Metal ones.
One can spend a lot of money for this:
http://www.usovo.de/shop/CNC-Machines-accessories/CNC-Machine-accessories/Accessories-CNC-Machines/Proxxon-MF70CNC-accessories/Tuning-Spindle-Set-2-mm::299.html
I just cut out a hole in the Sliding Bed and mounted the
printed part.
In the printed part 2 nuts are installed an one spring.