With the bar centralised at the rear of the boat, I've marked the places where those mighty three-millimetre bolts will be craned into place in support of the motors. The best way to do this is to 3-D render and subsequently print a pattern from T-motor technical drawings, but I used guesswork, wood and a bradawl called Brad Pitt.
The larger recess is to allow for the axle of the motor, which T-motor has extended to the rear by a mil or two for the same reason Bosch fits push-buttons to coffee-makers... that life sucks.
