With this little mount and a simple base plate you are able to enhance the stability of the Prusa i3.
This modification improved the output of my printer a lot.
Upon a request i added a dxf-file for my wodden base and a longer version for a Prusa i3 with "wings".
This mount fits for a 8mm threaded rod and a m4 screw.
Use four or more of it to fix your printer at a base plate.