FT Mini Arrow motor mount

I got fed up cutting wood for my scratch built mini arrows so I made this to slide into the plane instead. I like to mess around with motors so being friction fit I can just slide in a different set up if I'm in the mood. This mount is designed to work with the metal spacer you get with a lot of cheap motors, figured that was sensible because some of my 4s setups run hot after heavy use the holes are spaced 30mm apart and the holes themselves are 3mm. An m3 metric screw goes in nicely and won't