Adds rocket turret with recipe to fit vanilla game. Nothing less, nothing more !
Mods introducing new content into the game.
New ways to deal with enemies, be it attack or defense.
You can write your mod so it checks whether Bob's mods are installed, and then adds either a Bob's items recipe or a vanilla recipe depending on the answer.
But it works ;), also i not best in scripting. Its just simpler for me.