Welcome to the wonderful world of the 600 V2, I've had mine for a few months now, loving it. I use a couple of systems, I tend towards the RRS equipment, yes it does sometimes require a wait, but I've found the equipment faultless, I primarily shoot wildlife and frequently in Africa or the Antarctic/Arctic, this gear has never let me down, with one slight issue. I use the Wimberley Gimbal generally, I have two, and find these Gimbals do the job with zero issues on all my V2 Lenses, 300/400 & 600. On a recent trip to Botswana I tried my new RRS PG-02 Full Gimbal Pano Head along with the RRS TA-3 Clamping Levelling Base, what I found was the Weight of the 600 was pulling the head off at an angle, I suspect the issue was in the Levelling Base not being able to clamp tight enough to keep the gear level, when i replaced the RRS Pano head with the Wimberley i had no more issues. I believe the RRS Pano Head allows too much side loading on the levelling base/support system (I use the RRS "Andy Biggs" Safari Monopod Rig while shooting from Vehicles). My advise would be go for the Wimberley Head if you have a situation with a lot of vibration etc, such as vehicle mounted, the RRS Pano Gimbal though is a work of art. I also use the BH55 Head when not vehicle mounted & the RRS B series Flash Bracket system, again you cant go wrong with anything from RRS, but the Wimberley Head is rock solid as well.