Hi George.
Thank you for your quick reply.im using mach3.i completely understand in regards to accuracy come at a cost which in the coming future I will be looking for a new machine.im yet to fit the oiler which I've got boxed up still I hope to have this fitted this week.i ran some parts a few months ago with an accuracy within .1mm which I found fine to do but upon running it again today it's not even coming in close.ill take your advice and keep adjusting the backlash to see if I can get it any better.

Thanks again.
Luke