Here are some 3D drawings I did to give everyone a better idea of what it would look like;
The Y Axis, made from 30mm x 30mm Ground Steel stock, the linear rails are pushed against the reference edges by setscrews in the outer edge, overkill probably as the extra rigidity gained from this will be lost against the lack of rigidity in the machine.
X and Z assembly with linear rails added (and a different paint job)
The whole lot in its partially finished state (a lot of missing fixing holes)
Any questions or suggestions please feel free, you earned it after reading my mad ramblings