Quote Originally Posted by bluesking View Post
To make the C-beam bigger you're basically going to have to redesign the whole thing - you're going to have to put a lot extra of money and time into it to do that.
Have to agree with this - at the very least you're going to need a new ballscrews on both axis, and new profiles, by which point you've already spent the same again on the machine. Thats not even starting on what you need to do in order to do this job properly - I'd argue your money and time is better spent on a second-hand machine already of the right size and capability.