All these tools should be taking up a pilot slot. Especially the Wilsons handbook since it shows everybody sees every damage that is being done and also, if you are a gunner or "gungineer" would you really give up a gunner slot just to see the damage?
The stopwatch is reasonable, I think, but more if you are an engineer that has to watch out for his chem spray circles, since even when you bought this game, you can see the repair cooldown already visually, which kinda teaches you already that repairing with this engineer tool takes this long.
Also, I think the repair cooldowns, even from a mallet, are just too short in order to make this tool useful. I would add a buff timer to it with the chemspray timer, just to give more usage for this tool.
Now, "The Kitchen Timer" is nice when you are a gunner using more than 1 gun simultaneously, which is already rare enough, but is the bell sound really necessary? If you are going to use this tool, you might as well make use of it and glance at UI once in a while to know what's up.
The bell would enable the gunner to just ignore the UI itself and concentrate on shooting, yes, but then again the reload time of weapons are what? 4-8 seconds with a few excpetions? That bell would at times go off almost instantly, making it kinda pointless.
It's debatable if you combine the stopwatch and the kitchen timer, since both give information that's basically useless for the gunner and engineer. However, if you combine it, only 1 guy, (most likely one of the engineers) has to bring it and this guy just gives the necessary information to the other guys, which would increas the much requested communication, if you have a mic.
Another thing is: Would these tools still be active when you mount a gun? Because if they are not, then somebody who is not shooting has to give up a slot for this tool. But then again, it wouldn't really help the kitchen timer in some cases.
However, I kinda like the idea of having more tools that can replacing the spyglass, since there is no other tool that engineers and gunners could drive use from other than the occasional range finder, which is already rarely used.