Welcome to the new B.I.R.D. Forum. Please be sure to read the "New Member / New Registered ? Please Read" thread in the Coffee Shop.
This contains some important information.
To become a full member ( £5.90 a year ) simply click on your user name near the top on the right
I hope you enjoy the new site ................ Jaws ( John )
Hmmmmmm.... When I did my set up I think the ball with a thread on it cost about ?3 or ?4, the whole set up came to about a tenner plus I bought a cage later on for maybe ?20.
Sorry for the late reply, it comes with washers and cone that you cut to fit specifically to the yoke.
I can can testify that it DOES fit the blackbird @tu*@tu*