Hi coxy,

That's a pretty basic machine, although all the ingredients are there. Stiffness and accuracy will be your limitations - look at his video for the DemoP.COC logo and you will see the problem. About 1 minute in he tightens the collet and the whole thing flexes before your eyes! To his credit though, alot of work has gone into documenting it.

All that being said, for simple foam cutting it could be a cheap solution that is just about good enough.

You were looking making one 1000x600mm. You might want to build a smaller one using his design to get a feel for it, and then decide what you would want to upgrade for one that size. Those are my thoughts anyway . . .