Some simple documentation/guide for the more esoteric features
I would recommend using the guide(NPC) or recipe browser.

Musket Balls now stack to 500.
Matchlock and Flintlock weapons use crude bullets instead of normal bullets.
Flint is sold by the arms dealer.
Stone bullets count as Crude bullets.
I recommend not using your charcoal for Steel.
After the an boss is dead the merchant will sell a steelworking manuel.
Angry bones drop an item used for crafted the gunsmithing table.
You can throw one the mods items into shimmer to give the vanilla version
THE VANILLA MUSKET DOES NOT WORK
Obtain a steam generator to be able to use certain machines
mines act like statues, so hook them up to a timer with wire to have them work