I've got 350 mechanical parts in my warehouse that I received for a quest. It is a bit annoying as it's using up much of my space (350/1400). I want to purchase some better ships, but i need a lot of silverware and either I level up all my warehouses(short on cash) and town hall, or sell off these parts. Is there any reason to keep these? Same question for blue hearts and the tickets. Am I doing myself a disservice to cash these in ?