7' X 4' Combi

[Ricardoco]

Ok started work on the Z back plate, So i have a few questions.

Firstly i have 150mm between the centers of the guide rail blocks along the Y axis, to put the Z axis blocks on the plate i was wondering,
what would be the best configuration.
IE Above the upper rail and below the lower rail.
Inbetween both
or
1 above the lower block and 1 below.





Here are some Draft drawings that show Z above Y, But as i said im not sure of the best configuration.

So Ideas would be Welcome.


Rick