I like this idea, its along the lines of what I had planned for my own mod.
Just gotta make sure theres a reasonable way to level skills that are required to unlock other skills.
I'm finding gun smithing particularly difficult to level, even getting to 10 for repairs took a long time compared to everything else
Really loving the spear though.
Also I'm not sure if it was intended but with the left and right mouse actions on tools, you can activate both at the same time (hold down both buttons) to get double attack speed. It drains your stamina fast and actually feels kinda cool.
Edit: The helms are a bit odd. Some cause you head to disappear entirely (steel helm), others dont show a graphic (scrap iron + light, footballer + light etc)