This is the collar for my DIY Mk V Dive Helmet, and it’s been a real pain to get right. I definitely should have worked harder on the underlying structure, because it would’ve made the final steps so much easier. Now, I’m in a construction cycle that doesn’t seem to have an end. But the collar is finally starting to look like what I think a Mk V Dive Helmet collar should look like. It’s a lot of work. Apply body-filler, file it down, shape it, look at it, file it, look at it, file it, sand it, look at it……