This dock has worked well for my iFly720, however, when iFly changed their external GPS antenna connector from a straight MDX to a 90deg connector, it required drilling a hole in the back of the dock because there is no relief space to accommodate it. Airgizmo’s answer to that is to install it upside down.
The second issue came when I tried to upgrade to the 740b. While technically it “fits” the dock, it does not click and secure into place like the 720 because the frame bezel of the 740b is rounded and the 720 is squared off. The external GPS connector on the 740b is also on the opposite side of the 720. Once again, Airgizmo’s answer is to install the dock upside down which DOES NOT WORK since the 740b is rounded on all sides.
If you want to fly straight and level with no external GPS antenna connected then this dock will work for you. If you want to fly aerobatics, the 740b will end up in your lap.