Closet is right behind spawn entrance, allowing me to quickly replenish metal. Here is a video demonstrating how effective it can be when dealing with Soldier / Demoman outside spawn left exit. Only reason I'm not playing Pyro to airblast is because stickies = big problem.
I've figured out why my last two videos have blue lines. I needed to edit each individual frame (took me a while) for this one, but it was because I was recording in Half-Size, which condenses the video to half the resolution. TF2 doesn't work well with on-the-fly compression. I prefer higher-quality recordings anyways, so it will be 100% fixed next time I upload.