I bought my P3A on ebay used and it came with snap on prop guards already installed. I haven't used and don't plan on using them in the foreseeable future so I just tried taking them off. I removed all 4 screws from one of them and realized I don't have the original screws to replace them - they weren't sent with the drone. I know I could just leave them on but if possible I'd love to have my drone 'au naturale.' Must there be screws in those holes? What do that keep attached to the drone? And how can I get screws that fit if I need to?