I'm now at 4.
On a related note....
The "Clown Collar" that so many people dislike is really neat because of what it represents.-The Artillery Hood is another one of those old militaria nods the Imp Army got. If you've ever seen "The Guns of Navarone" you'll know what I mean. (Yes I am well aware of the lack of accuracy and the Farb factor in that movie, it is just an example)
ALSO...
For all of us who grew up in a time when every not every freakin character under a hood, mask,helmet or rock was a f++++++g Jango Fett clone...I have found that Han Endor's head fits good (maybe a future Tie Pilot Custom) also Luke Xwing fits pretty good...I'll have a list of heads soon that can be swapped. And the helmet fits over it fine.