Kim, I got something for you, what you need to get the Speed Booster support, is a Wooden Camera Micro cage, and I have one for you, brand new, Merry Christmas. I will get Jason to send me the replacement foot for the Metabones Speed Booster (you do have a Metabones BMPCC/MFT Speed Booster, right?
PM me your postal shipping address. M
The WC Micro Cage has two screw hole mounts on the front, that line up on the the replacement foot (which I helped to develop), and you screw to the foot mount to the cage, the put your bracket under the Micro,csge, which does not add any significant amount of bulk (just a bit), and gives you bith 3/8 and 1/4 minting holes in too and bottom of the cage. A very solid setup. Later you can add the WC PL mount when you get your S16 lenses!
Cheers