I recently dug and potted several red mulberry saplings in adverse locations with no real plan for what to do with them. I would like to try to graft a fig to the roots.

Has anyone ever tried to graft a fig onto a mulberry rootstock? If so, please share your experience and if you can address any of my following questions, it would be appreciated. Would this end up being a RKN resistant tree? Would it result in a very large fast growing tree? Would it retain some of the cold hardiness of the mulberry?