To assemble the "Scorpion 2" tricopter, use the 1.5" bolts and lock nuts to hold the spars to each mount and for the tail spar to the body. Use the 1.5" bolts and wing nuts to connect the left and right spars to the body. This is so that it can easily be dissembled for portability. Use the 1" bolts and lock nuts to mount the motors onto the motor mount parts. Cut off one of the servo's (the one by where the wires come out) connector extensions and use a wood screw to attach the servo to the housing. Use 1.5mm screws or push rods to connect the servo arm to the tail motor mount. Use 4 wood screws to attach the Flight Control Board onto the body. If you're using the KKmulticopter v5.5 board, use the Yaw Gyro Protector to keep it from breaking. It's a pretty fragile part. Use velcro straps or zipties to attach the battery to the bottom.
Make sure you clean out the supports from the parts after printing them.
There is space inside the body for the power distribution system. There are also 4 slots for wire sets.
Follow the image renderings if you need to.