To address the short-range capabilities of the welder, I'd like to suggest a mid-range attack that could be valuable for fellow Battle-Engineers. If you right-click with it, could it shoot a fire projectile that fizzles out after a specific distance has been reached? I would love to use something that isn't the stock Shotgun or the Widowmaker, but the Rescue Ranger doesn't have enough firepower to be a viable Battle-Engineer strategy.

Edit: Oh, I was wrong. It's a secondary instead. I like this better, though. We already have a primary that fixes buildings, so I much prefer it as is.