@gjo has a system for engraving cylinders . With some gearing and source compression, this technique could be used to stretch the Y axis. Not sure how well it would work in CNC, but it should work for engraving.
But pretty much anything you make is going to have to fit between the two Z modules, so you’ll have a hard time making the X axis wider.
As to alternate setups, like @Atom mentioned, I’m not seeing many people talking about it. A similar setup was mentioned with the v1, but haven’t seen anything that supports it out of the box. My search-fu is lame today; I only found one unanswered post. I think I’ve seen some people that managed to do it, but they were comfortable editting GCode manually and voiding their warranty. But don’t quote me on that, since I can’t find any support for that assertation.