Upload & Sell: Off
I use the smaller telephotos, not being able to manage the 500s and up, so my experiences only involve the 'Jr.' versions for a few gimbals.
Recently I tested and then returned a Jobu Jr. 3, the return was NOT due to ANY performance issues. In fact my better half liked it's smooth near effortless use. After some further use, due to my disability issues, I found the locations of the adjustment knobs, one left, one right, to be difficult to use/adjust; my left hand is much weaker then my right. This gimbal is smooth, easy to move in all directions, nicely designed/engineered and quite sturdy.
As a replacement I picked up the Custom Bracket (CB) Gimbal-LS. All of it's outer adjustment knobs are located to one side, the knobs seem larger and easier to turn/manage then the Jobu; although I did not test them side by side.
This knob location and touch/ease of adjustment issue is a huge convenience for my use. The bracket also has additional adjustments at the camera/lens attachment point that help fine-tune balance. Again the design, wing nuts instead of smallish knobs for adjustment, added a bit more convenience for my use, particular physical needs.
As with the Jobu, the CB Gimbal is super smooth in operation, well designed and sturdy, they also offer larger/heavier versions for the bigger whites. Either of these Gimbals would be a nice lighter weight alternative to the standard larger models.
Note, I use an Acratech GP Ballhead for other support needs. It has a gimbal feature, but I've found it is not well balanced with camera/lens hanging off to one side, this positioning is not as easy to use as a standard gimbal is. Both supports have their use, in my experience, with my handicap, while the dual-purposed solution is cheaper, it is not the easier/sturdier option.
Happy Gimbal hunting, hope you find the support that fits.