This just arrived, and I'm not sure yet if it's a keeper. Can anyone tell me if this has regular spring bars with fake screw-heads or if the strap is actually held on by a pin that screws together? It has what looks like screw heads on both sides of the case. If it does actually screw in place does anyone know with certainty that they use thread lock, such as loc-tite? Is one method considered more desirable than the other? If it screws in, any idea how difficult it is to find replacements if it's necessary? Anything else I should know?