1. How you guys are going to make it Modded? Will be there any plugin that edit some functions? Planning something?
     
  2. To make a blueprint you need to find the item you want to make blueprint of in the world first you do not find them in barrels etc so only real requirement is that your loot table has every craft able item available to spawn somewhere on map or people will never be able to make a blueprint of one.People that have blueprints can make blueprints and give them to you though but if a say stone barricade is not in your own chosen loot table no one will be able to make that first blueprint ever. I am sure it will change a lot in a few patches but this is my understanding of it so far :)