Are you going to add the Yuma activation switch that the arrow is pointing out?
No, I decided to keep it the way it was because to me it looks like two countersunk screws.
If I decided to do another one with sound, I will put the switch in the box...hard part is though, the machinist who made them has no more left. I can use a standard TCSS box style 1, but it won't look 100% right.
No no, I'm not talking about the countersunk screws (and yes, that's what those are...and brass). On the side of the box there is actually an activation switch. I was shown a 1524 x 2519 hi-res version of that photo. You can see every little chip and scrape, and a long, thin activation switch with beveled corners. Anakin Starkiller included one with his kit. I'd take a pic for you, but I lost the tiny part.
Necro post! just throwing this idea out there - the Yuma stunt in the pic above under Mark's chin - are we sure the grip rings are beveled on the edges? The way the shadows are cast, it looks like the black in between is flat. (Except for the shoulder)