So I've narrowed down my selection... I think. Keep in mind to use Auto lenses like the Sigma and Canon and utilize the auto features, I would need an electronic adapter (No budget for Metabones). This rig will be used for Cinematics and BTS's so I don't know if OIS is something I'll need however focus will be controlled manually with this FilmCity Model.
Adapters (EF lens of MFT x 2.88 Crop Sensor):
My rig will be nearly identical to the setup on the left:
If you have any suggestions, inputs, criticism on why this is a terrible idea and how I'm inexperienced with no concept of reality... please leave them below because I'd love to get your opinion Cheers!