... I'll probably pick up one of the headband models for the crane operator...
This would not only work well for the crane operator but it might work for some of the other crews' members. The SPH10 can be used with or without a helmet. With a ball cap they are comfortable and work great. Under a helmet they are less comfortable but they do work and would be less of a hassle than switching wires and all the other stuff to different helmets all the time. The guys would just have to use earplugs for noise protection. The SENA have plenty of volume to still be heard. They are not as rugged as the built-in helmet units, but still....
David