With your object you can Fillet it to 24 cm (if unity is cm)



The other face...
About the export to C4D I believe that you can take Ngons so this meshing is sufficient... (2 000 polys)
I made the base inside Moi because I have not C4D! ;) (maybe base/ Intersection Object... Fillet only 20 cm)



Here in the free Simlab Composer Lite (max 1920 * 1080) without any regulate! (accepts the Ngons! ;)