Here is a somewhat relevant e-mail exchange with a potential customer:
Hi Harvey,
re:
Could you please direct me towards a suitable tripodI w. ill be using a 500 canon prime and a wimberley gimbal head
Are you set on the Wimberley head? (In my opinion, the Mongoose M3.6 would be a far better option for most folks provided they are able to easily support the weight of the 500 in their right hand for about 15 seconds.
My height is six feet one inch. Should I order the GT3530LS or the taller GT3541XLS?
I am 5'11".
Is the less expensive 3530LS suitable for my height? (I do not want to bend or hurt my neck doing flying birds). Thanks for your advice .
Knowing what I know, I would go with the 3530LS. You will be fine with the height 98% of the time. If you are photographing birds in flight in good light, you can simply pull the tripod legs in several inches to get a bit taller. The thicker lower leg sections of the 3530 and the stability that they offer would be the main reason for my choice.
Whichever tripod you choose, we would of course greatly appreciate your purchasing it from us :)
Later and love, artie