I hope I explain this well enough for anyone reading. I am having troubles figuring out how to check if an empty mine cart is in relative location of a BlockPlaceEvent. I have it so if you place a redstone block it would check, okay its a redstone block, is there a <specified Block> below it? If so continue. Is there an empty mine cart under this <specified Block>? If so then continue. Unfortunately I haven't quite figured out how to detect/check for the empty mine cart. If someone can lead me in the right direction that would be great!