Fixing a story problem.
Great work on the correction and the reasoning and rewording. I love that everything can be so fluid here anyway, so I wouldn't have any issue with simply going back and editing the original post, perhaps with a little footnote explaining that it had received a tweak.
Also, I've used a nailgun only once in my life whilst building something. It terrified me, but I got used to its heft and became better at its operation. However, the one I used had small air canisters that you slotted into it. It didn't need to be hooked up to a compressor. Each canister would work for X many shots. You just had to switch the thing on and wait for it to whir up before the first use. Not sure how long an unspent canister could be left inside. Perhaps this was a smaller nailgun, though. Anyway, I kept it well away from my temples and femoral artery ;)