Lack Stand Corner Mount Tool less 2

This is my remake of my Lack Stand Corner Mount Tool less. This time i needed the first Table to be higher. So i added a Stack into the Top Cube to rise the Table

I wanted to stack Ikea Lack Tables on a furniture Roller, i bought at Amazon (asin=B00B8NVWOQ, Modelnumber=20135801).
To stabilize the first Table on the furniture Roller i edited, rendered and exported the .scad File as .stl. I did this in OpenSCAD,

The furniture Roller has Dimension of 585mmx585mmx145mm.
The Wheels have Breakes
The Wheels are 48mm and 49mm away from outer Corner.
The Ikea Lack Table Legs are 50.5mmx50.5mm (possibly 0.5mm thicker).

I still need to create round Edges. I dont give up on a nice smooth Look. Still no Minkowsky Skills. Feel free to help me out here.

I am not yet sure with what Settings i will Print that Item.
I have a Geeetech A10T and a Anycubic Mega Zero 2.0.
I will make use of Octoprint, AstroPrint and Cura Slicer.

I am thinking on making it sturdy.