Normally I would not be too interested in this sort of thing. Honestly I don't really get the hype with these shoulder mounts. However, this is so well made and the follow focus he added is genius. Check it out.
DIY DSLR Wooden Shoulder Rig from Jonathan Clifford Bergqvist on Vimeo.
I want a one
Ingenuous idea with the follow focus!
Might have to come up with something like that.