Quote Originally Posted by Sterob View Post
Its basically a 6040 sized bed but the frame will be larger so the tool will reach the whole bed area ( at this stage. )
That's ridiculous overkill and a complete waste of money. I've built many machines this size and larger using 45x90 using the "L" design gantry and they are plenty strong enough for a machine this size. You'll get away with a much smaller profile and 80 x 120 would still be massive overkill for a machine this size.