I use and have made various "flying rigs". A few years ago there was a device called the mic positioner, this allowed the mic to be directed via a radio remote, though I am not sure if this is still available.
With the home made rigs I have used these have ranged from a 2 point mount with a cross shaped arangement to the latest one that is a triangle with three mounting points to prevent twisting. This I suspend with nylon sailing rope (available in different thicknesses and breaking strains). This is relatively successful. I plan to add an additional triangle frame to the top that can be attached with lighting brackets to any standard truss.
One thing to note, some venues will insist that the suspension system is steel hauser, apparently to prevent it falling on someones head in the event of fire! (What someone would be doing sitting under it during a fire for the life of me I can't imagine), but rules can be rules and you don't want to find yourself in a situation where you get a visit from the fire inspector telling you to change it or remove it.
Good luck!
Regards
Roland
