Hmm... It's a good question I've never tried it!
Theoretically it should work fine, as long as you can edit the mesh and resave it in your project as a mesh, then you can also set it up in the meshFilter object and the mesh collider object. I don't see why it wouldn't work.
I've used probuilder to make new objects, converted them to meshes in my project and then successfully atatched them to the suimono_object without any problems.
With version 2.0.0 I've included a utility script that will save a mesh from an object in your scene into your project folder (as some meshes only exist in the scene itself, especially when created dynamically). To use this add the utility_saveMesh script to your object, give it a name in the "Use Name" field, and then press the "save asset" checkbox. It should save the mesh into the "Suimono/MESH" folder.
Good Luck!