Pen holder circular base version B

I was inspired to begin designing this piece by a recent video of Arrimus 3D's showing his modelling workflow for a pen holder or pen holder circular base which I wanted to try and re-create in CAD before modifying it to give it a distinctive, interesting look and add some more visual complexity by way of additional extrusions and material removal. This version differs from version A in that its internal walls are concentric and radial rather than straight and angled 90 degrees from each other, in a grid pattern. Additionally, I also extruded rectangular sections, with rounded corners, from the portions of the roof which I'd left contiguous in version A. Finally, there's webbing / reinforcing girders under the roofed sections, as well as long the edges of the rectangular extrusions cut out of the roof. 2 planes of symmetry. Solidworks .SLDPRT format conversion kindly provided by : https://grabcad.com/kathy.pannke-1 .