Hello John, Many thanks for letting me know about Constant Precision and I will certainly give them a call and hopefully they will re-machine my saddle too. Im very glad you got your mill sorted out in the end and I suppose there is a moral in this story for us that you only get what you pay for however it seems that once this re machining is done the mill is then perfectly accurate.I will keep you informed how I get on,once again many thanks for replying to my question.
steve