Frame edited to have:
*Interior Hexagonal grid to have a more robust frame.
*Extra 3 screw holes to have a more robust union to the wooden base.
*Added an extra rod to the back of the frame to give robustness as I have seen that the whole frame twists when z motor encounters some resistance.
"y" motor stand provided with 2 bases/screw terminals. Seems to be much more robust than the single legged version.
If needed I can upload de .scad file although it is not following the programming style of the original file, it is more an add-on.