Hi Jazz
Thank you so much for taking the time and effort for such an in depth, lengthy and informative reply,as always you are on hand to help anyone in need with your knowledge and advice, i hope the other guys on here {in particular the newbies looking for help and advice } are appreciative, because if it wasn't for you experienced guys offering your free and impartial advice then inexperienced guys like me would never attempt to start a project as complicated as a self build cnc. So a big thank you to you and all the other guys who offer there advice and comments to newbies :] :]