The following pages show the drawings of the various components that make up the torque tube control stick with  the exception of the column itself, this has to be of 1"diameter material to sit in the front fork saddles and give clearance for the lower torque tube.I have left this out because the positioning is an individual thing which needs making to suit what feel correct for you.
A major advantage of building the stick yourself isthat it can be tailored to suit the individual craft and/or person rather than accepting a compromise position .