Turn the motorstick so the BOTTOM is facing you, and see if the prop hanger has side thrust. Note in the picture that the left side of the propeller is higher than the right side. This is the side thrust that helps to pull the nose of the model to the left when flying to make it circle, the proper amount is around 2 degrees.

Apply a small amount of glue around the prop hanger. Once it dries, remove the prop from the prop hanger and wrap the nose with some thread. Apply glue all around the thread. The thread helps protect the prop hanger from breaking off of your model. This can happen during handling, when the model hits the ceiling, or when the model lands on the floor.

Glue the rear hook to the back of the motorstick and wrap with thread the same way the nose bearing (prop hanger) was.

Now we need to prepare the propellor. First place a SMALL drop of superglue down the shaft hole on the prop hub. the purpose is to glue the wire shaft to the hub. Be careful no to let the excess superglue run down the wire shaft into the plastic bearing, otherwise the prop may not rotate.

Draw a line on the prop blade which is half the diameter allowed for the division you are flying. Division C props can be 24cm in diameter, so make the line 12cm out from the center shaft of the propellor. For Division B models the maximum allowable diameter is 18.5cm, so half of that is 9.25cm.

Use a pair of scissors and trim off the tips of the propellors. The upper propellor is for the Division C model, and the lower prop is the Division B model.