The plans I`m following are here: https://www.raynerd.co.uk/wp-content/upLoads/beltdrive11.pdf

Basically, this mod replaces the plastic gears with a belt drive on the X2 milling machine. It is well worth doing! Sorry, didn`t take many pictures of this one in progress, just a couple of vids.

Large Pully:
httpv://www.youtube.com/watch?v=u9Ux-_Zvu2g

Finished:
httpv://www.youtube.com/watch?v=iB8hBJ2IW94