Well folks while it is great to have the best on the market. 5d mark iii TT1 TT5. So the problem is you cannot adjust the power using the AC3. If you see Mark Wallace working the process with camera and TT1 TT5 and AC3 you feel ok this is perfect. I want this setup. Pocket wizard are working on a Beta firmware ......more waiting. The only way I can get it remotely to work is to press the test/learn button each time just to operate and adjust power levels. Oh yes I use 2 580ex and 1 430ex . All my gear is up to date on firmware. I like to use the AC3 in manual mode more control like the mark Wallace video. However it would be nice to set the 5d mark iii in auto mode so the the flashes can judge the proper lighting then adjust accordingly with the ac3 . It's fricken frustrating. How long do we now have to wait for this major problem to be fixed. Oh yes my 5d mark ii works perfectly with the system . Also the latest firmware for pocket wizard is 6.00. They are looking for people to participate in a Beta trial so they can work the problem. So just wanted you all to know about this important update. Please feel free to reply if you have the same problem.