Hi, I had similar dilemma for a tripod head for my GH2 with 100300 and 14140 combo. I mainly shoot wildlife (elephants) and nature movies. My solution was ultimately a self designed gimbal which weighs 350 gms (.75lbs). We (I own a precision manufacturing shop) now plan to make it commercially available. Do visit :
www.steti.co.in and http://igg.me/at/stetimicro
We are running a crowd funding campaign on indiegogo.
Cheers
Sanjeev