What would it realistically cost to have a press made that could make headphone cups ? I was thinking of making some indestructible headphones , I was discussing with my gaming friends and they would be will to pay £200 plus for a set of headphone that where modular and great sounding but would basically last a life time, the only thing when I did my pen on paper drawing I couldn’t really make is the cups for the phones. Could I make a press for ally cups or would I need a cast iron press ? What would it cost to get one made ?