Yes, I find Zubbly's [RIP] pendant arm method very good for balancing in my limited experience. My last time was a couple days ago and I used a threaded rod to overcome a large imbalance using an L bracket made from 2" angle iron to hold the rod in a radial position with enough nuts / washers on it to balance.

A fairly detailed and large photo is here:

http://www.anotherpower.com/gallery/4415-8-foot-prop-project/100_1415

and here:

http://www.anotherpower.com/gallery/4415-8-foot-prop-project/100_1417

Big photos for detail. It was ripping along pretty good but I think the detail is there for folks to copy.

The threaded rod is good as you can adjust your weights in and out to get it just right then lock it all down.

It is spooky to see equipment get into that "its all physics now" mode. Glad it sorted out OK.

Thanks for the share.

Tom