bioteacher wrote:
General rule of thumb - you should only put 1/2 the load weight on the tripod. this includes camera, lens, head or gimbal, etc.
Yes, this is what you should be watching out for. Weigh your camera attached to the lens and if it weighs more than 6.5 lbs then get a bigger tripod. I think I read that your tripod is rated at 13 lbs. It really looks a little light for your big lens to me but I don't have the specs on that lens to know for sure.
MT sells a pretty cool carbon fiber gimbal head that I'd probably try if I didn't already have a Wimberley knock-off.