The OX is quite an old machine (2013 vintage), rather consider building one of the more modern kits? Machine Bundles - OpenBuilds Part Store - stronger, better, faster Otherwise, the old Ox build is here: OpenBuilds OX CNC Machine
Its a modular design, change what you wish. But again, you are far better off building a LEAD1010 for example. The Ox is not nearly as capable as the more modern designs