Rayspeed hubs?

[sime46]

Just fitted some of these to my X-6. I read on Ellis's set ups that he took 2mm off the hubs where the balls screw in. He talks of washers under the ballstud, I wondered if someone can tell me the washer thickness so I can fit the right ones. Also, in order to get 4deg of antisquat, what thickness of shimz should I use.