no, nothing wrong there, just fill in the actual numbers for your machines travel limits. now... open Tools|Phlatboyz|Options|Machine Options and fill in the real max travel numbers for your machine. Now all future drawings will default to those numbers as max material size. What I do is set the 'safe travel'/material size according to the material I have on hand so I can lay out the parts on the material, allowing for clamps of course. This way I know that the parts will fit the material I have, since the machine I use can take a full 4x8' sheet .