Hi all just a few questions!

[Jonathan]

They will have been asked before belive me.!

Yeah, so type it in the search box first...

PLEASE PLEASE PLEASE don't build a machine using MDF you will regret it. . . . .I know it's tempting because it's available and cheap plus your used to working with wood Etc but it's got no place in CNC if you want a machine that's going to last more than 1 winter
and be accurate.
From a business point of view you it will inderr more than help and you'll be constantly chasing problems costing more than the time and money you saved.

I'd just like to reinforce the point that for any machine, particularly one this big MDF/wood is a waste of time. It may work to start with, but not very well and you'll only end up upgrading it so might as well start with it good, i.e. metal frame.