i was having pops help me out and he totally shot down using screws so i ended up using some epoxy. i left it on a little too long in one area where it didn't belong, i scraped it off and some paint came off with it.
I definitely prefer using bolts. I use my Dremel to carve out little dish shapes on the backs of the ear pieces and use JB Weld to secure some bolts. I do it so that all that shows is the threads.
Then I drill holes through the sides of the helmet and attach the ears using nuts/washers.
I've done several helmets this way and they stay on.
maybe one of you more skilled bucket-men here on TDH could do something with this. i leave for the Navy on the 21st so i won't have the time to be messing with this helmet myself unless you guys could give me some tips that are doable in 4 days.