Blue Jay models UFO
 

I am in the process of building a Blue Jay UFO kit. I am having some trouble with the step where I am to add the motor mounts. The plans give two different sizes of wood, neither of which are included in the kit. And the instructions are very vague. If anyone has experience with the kit and could aid me it would be much appreciated. Also, if anyone has a set of original instructions from a Bridi kit I would love to see them. Maybe they are better than the ones Blue Jay provides.