Printed ESRA Parts Blue
Here is a set of parts in case you don't have your own 3D printer but have plenty of your own servos.
Keep in mind these are printed for the Hitec spline!
READ THIS CAREFULLY! These are not perfect! most parts have some side warp. I make no guarantee of fantastic printing. Perhaps one day soon I'll buy a better printer but I normally use my printer for just prototypes and for parts I can't make with my mill. So if you want something more durable and reproducible check out the CNC cut options.