the manual is very confusing. here's a really quick, simple guide.
-put on two or what you think would be a close guess of weights on both sides.
- attach your camera to GC, place on flat surface. lift up.
- notice direction it is turning/tipping.
- loosen all 4 adjustment screws (not the QR locking screws) and make small adjustments of where the camera plate sits on the GC. Note: this is for HD-2000. GC 2000 pro is similar, but I believe you don't use screws to change the camera plate location.
- when GC can be picked up and remains flat for a long while, do a drop time test
- Hold GC 90 degrees sideways, with the handle remaining upright. let it fall back to straight up and down. it should take a few seconds, about 1.5-3. if faster, shorten slide length. if still too fast, take off weight. if too slow, lengthen slide length. if still too slow, add weight.
- adjust distance of weights from the centre, this controls how slowly the GC will rotate and angle. you may actually want to do this one earlier as well. it's not a critical adjustment for me though
- make sure it still is properly balanced, test on a table again and adjust accordingly.
hold it steady with your right (or left hand if left handed) and balance/turn with your other hand. I've attached an old camera strap to my Camera plate so that I can let it hand slightly when not filming.
Hope that helps