Hello, first of all, wonderful mod, I'm having a lot of fun using it, thank you very much for making it.
My two suggestions are the following:

First, a volume setting, something to allow me to change the volume of the shotgun. My game is relatively loud so when I use the shotgun too much it gets pretty bothersome, and a way to reduce its volume would help a lot. I don't know if it's possible to change the volume of items being placed by the shotgun too, but they would both be very welcome. If it helps a bit, I know Jetpack mod has a setting for the volume of the jetpack, it's just a text box to input the percentage 0-100.

Secondly, the cheat mode. I don't know if this would go against your vision of the mod, but I would like an option to activate this "Cheat mode" and have the shotgun not consume ammo, maybe fire faster, and maybe, maybe destroy cliffs without the need for cliff explosives?(this last one is very specific for me, as I kinda love and hate cliffs, and being able to remove them before vulcanus with the shotgun would be cool, as I mainly do this with the few that block my blueprints by one or two tiles). Faster fire rate would go well as new researches too, but the main one for me is the infinite ammo. Using the shotgun is way more fun than early bots, but I don't like how having too little ammo breaks the flow of building.

Thank you very much, and sorry if anything wasn't clear, english is not my first language, so ask and I'll try to explain myself better.