wedge for motors and couplers for rc dual pump boat

whilst producing the rc boat using these files http://www.thingiverse.com/thing:832027 I needed to create a mount for dc motors that I took from paper printers.
I also created mount from the dc motor pulley to the shaft of the propellers.
Check out this my videos
https://www.youtube.com/watch?v=jYU5JMdBcj4
https://www.youtube.com/watch?v=fjkuvkhbZB8
https://www.youtube.com/watch?v=M4cSlvJIX44
https://www.youtube.com/watch?v=PQpyrvPlb5o