I added stainless steel inner gantry plates to my Aluminium Ox to increase the precision of the OX gantry.
These inner plates make all the bearing bolts act together to dramatically reduce racking and improve the way the wheels track along the extrusion.
I have included step & DWG file. If anyone would like laser cut versions please contact me.
Inner OX wheel plate 2015-02-27
Strengthen your OX gantry assembly using inner plates