Folding Propeller Adapter (6mm hub- CAD file included)

I am building a RC airplane, that i needed to use folding propellers but i couldn't find 6mm adapter in my country so i decided to make one for my own. It worked and performed great actually. No balancing issues. Solidworks file is available if you want to change diameter. It needs 2 M3 nut and screw to keep the props in place. Hope it helps.