Posted my 'rig' from rigbuilder. My overclock is stable at 4.2GHz running Prime95 with the i5-3570K cores running from 67 to 76 degrees centigrade. It idles at around 1.6GHz in the mid too low 30's.
Many thanks to you all in the forum, without you I would not have had as easy access to resources and information.
I am not going to push it and see the maximum overclock possible, as I am completely satisfied with the results as is.
Kindest Regards, and Peace,