One of the big problems with the Godox AD600 and AD600 TTL was the position of the bulb relative to the modifiers. It just sat a little too far back into the head, and many people felt they weren’t getting the power they should. Godox largely solved this problem with the AD600Pro and AD400Pro, but there are still many AD600 owners out there.
TurtleRig has now announced its newest solution to this problem, with their version 3 bulb extensions. Essentially, they’re shims which sit between the strobe head and the bulb, offering extension pins to bring the bulb out further from the modifier. They’re available for the original AD600 models as well as several other Godox strobes.