Hi,
I'm new to Rising World and finally figured out how the blueprints work. Technically this isn't my first blueprint but the first one I've made that I like. The oven door opens and each burner can be lit separately and they do cook.
The grills on top will not appear when you place the blueprint but just place a grill on each fire and they will work fine (the grill automatically resizes to the fire).
As most others say, you are welcome to use it anyway you like as long as you give credit.