Printed a mounting adaptor for the OpenMV cam: https://www.thingiverse.com/thing:1760940

For prototyping, I put a long zip tie on the back and used that to hold it in place in the brass tube I had lying around. 

I also used 4x zip ties around the perimeter of the platform to hold the brass tube in place. Had to put a bit of double sided tape to make it a little more sturdy.