Boston based videographer and performer.
9 lbs for just the gimbal. 12lbs with the ring.
I would think that the mixpre-d would be a better solution in this case. The C300 II has decent audio inputs. Just feed those with any of SD's current mixers and you don't have to worry about TC.
Vape between lines.
I would not suggest a 5D primarily for interviews. If you feel you need a Canon DSLR, get an 80D or other crop frame camera. It has video autofocus and the lenses are cheaper since you can get ef-s lenses.
Also, if you already have a photo camera, I would suggest getting a C100 rather than a DSLR. The C100 will have much better video and you can record audio directly to the camera without a mixer or noticeable less in quality. C100's are also relatively cheap right now.
This is good info: https://tiffen.com/diffusion/
I'm a fan of Tiffen Black Satin. Reducing sharpness is best done in post, but natural looking flares and halation are easier to pull off with a filter.
The ML team hasn't done anything with any of the newer cameras. I think that project is dead. At best, somebody might take a look at the MKIV, but that isn't even the same DIGIC processor. Plus, there is no reason to believe that the HDMI port or processor is capable of reading the sensor continuously at a 4K resolution.