I'm making a shop system (without the use of HolographicDisplays) and I'm having some issues with having items stay in place and interacting with them. I have no idea why, but the PlayerInteractEntityEvent is not working, so I don't know about that. Moreover, the items keep spreading out and jumping around. How would I keep these items in one spot and what methods should I use to detect interaction with these items? Would I have to extend EntityItem?