I had a new idea today to add another layer of difficulty to the game. To build more complex nodes or items you may need a construction plan. To get this plan you need to find it first or you need to develop it in some way that I don't know yet.
If you hold the plan in you hand an use it (leftclick) it opens a form similar to the crafting grid with the nodes you need to craft the item or something more like a real plan.
To craft the item you need to place the nodes plus the plan in the crafting grid. If you craft the Item the plan stays in the grid. To make it more realistic the plan should be wear every time it is used. But I think this currently doesn't work. I opened an issue
To make a copy of a plan you can place the plan, a blank plan and ink in the crafting grid. Ink could be made of water, blue dye and an empty vessel.