DIY steadicam design

I sketched this out. I ain't no artist, but I did take two years of "Mechanical Drawing" in high school.

It looks very similar to a camera stabilizer that's available in the UK, but I plan to make the gimbal (in the handle) with a universal joint ($5 on ebay) and skateboard bearings, instead of a ball and socket.

I'm thinking I'll need to buy the GoPro tripod mount, to connect this steadicam to my GoPro camera housing.

The arc will be a flat bar of aluminum or steel, or maybe a chain-link fence tension bar - 1/8" thick, 1/2" wide, galvanized steel.