When using my SLR as a video camera, I have a wireless remote and compact shotgun. With only one shoe, I usually had to leave the remote hanging. This adapter allows up to 3 devices to be attached with a single shoe.
Even though the two accessories cover the middle shoe, I left it for flexibility. Perhaps I'll look at making a larger version in the future.
My camera is a Canon EOS T5i / 700D.
Designed with the Student version of Autocad Inventor 2014, so licensed for non-commercial use.
The features for the shoe's clamp are relatively small. I kept the resolution at 0.1mm or 0.15mm in all of my test prints. To give the "shelf" a bit of stability, I set the infill to 30%. May need to adjust depending on what you want to attach.
I left one side of the adapter completely flat for placement on the bed.
Supports are only needed for where my logo is on the shoes.