Sorry forgot one last thing. If you havent already try and steer clear of the joiners from jaycar. I bought them and found them to be more hassle than worth. There is slight backlash to start and the middle rubber coupler wears out really fast. Would be good idea if you do to CAD/CAM the middle joiner and make another one from HDPE/Delrin which might help and stop alot of the problems i had. I ended up getting some help from a regular lifesaver on these forums and they were proper lovejoy connectors. Try for these if you can.
Daniel |