Gimbal Camera Stablizer (GlideCam)

Wanted to experiment with gimbals and camera stabilizers. Design wise I went a different route, I used squares instead of circles. Another thing I designed in was the ability to have one or two handles to control the rig. I used two different sets of ball bearings. Smaller ones for the gimbal to keep the design as small and light as possible, then normal skateboard ones for the center and handles. All in all, its balanced quite well. I tried different methods of counter weights and I ended up going with the glidecam's method since it works the best. In the end I had alot of problems getting the balance just right, I did the 3 second drop test and everything. I always had a little drift back and forth, so video looked as if I was on a boat. I think my issue is getting the top perfectly balanced, so I think I'll buy some bubble levelers and make a slide plate quick release setup. Thinking I can use some screws to allow small balance adjustments. Some of the things I used. 4mm x 13mm x 5mm Ball Bearings http://www.amazon.com/gp/product/B00AUB7M3C/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1 8x22x7 Ball Bearings http://www.amazon.com/gp/product/B00PI3ELZY/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 Double Lock Handle bars (The large bearings FIT PERFECTLY) http://www.amazon.com/Locking-Bicycle-Handlebar-Mountain-Floding/dp/B00E35Y9P0/ref=sr_1_3?ie=UTF8&qid=1426083520&sr=8-3&keywords=handle+grip