Big Baby is a 150mm X8 for 3" props. It has a 4mm base plate and a 2mm top plate. The motors are stacked using low profile 2mm catdog mounts.
Stack height is 25mm, which fits 2 4in1's and the fc.
The frame is drilled for 2 30x30 and 20x20 stacks.
The fpv cam mount and antenna mounts wedge in the DJI air unit.
Andy Shen runs 1407 2800kv's with a 850 6s.
You can print the parts yourself, files are here. Or we can print the parts for you.
Andy is calling this a beta because "I'm not sure why this little guy needs to exist, other than fun, or a tiny cine platform that can be as fast as a 5inch. The frame design is pretty solid and I don't anticipate it changing much."