About those fillets, I really like to 'voxelize' everything now. It's a little bit ... brutal.

I really like Houdini for that process, once the little setup is in place (convert to voxels, small smooth filter on the voxels field, convert back to poly, reduce polycount), you can reload your Moi model in one click,
and get a quick feedback during the modeling process. The voxels conversion will wash out / blend fine detail too, emulating the printing process somehow.

It requires a good amount of memory (min 32Gb for mid size models)