Need advice on gantry design

[EddyCurrent]

1. Top and bottom rails need to be further apart, i.e. vertical part of the "L" needs to be taller.
2. Z axis is way too far away from the gantry, it needs to be as close as possible to it.
3. The Z axis plate should be wider, when looking at the front face of it. It needs 2 bearings on top and 2 on the bottom, these should be as far apart as practical to resist sideways deflection at the tool.