Dear friend, I think I can help you to solve the problem here, but, before that, I think you should reduce your complaint, because complaining doesn't solve the problem, calm will make your mind.
Your problem now is you want to assemble it, or do you want to transform it.We are also studying double nozzle, may soon do it, I am a 3 d printer technician, I have 4 years experience of DIY, you can believe me, but I need to understand your real thoughts.