It's like Solar. I was thinking about an array a few years back but the math basically said that if I built something that would take around 10 years to pay itself off that in 10 years the array would be so much better that it would pay itself off in 5 so what was the point of buying a older design that eventually needs upgrading and would take the same or more time to pay off? Why do you think I am printing on a really old extremely modified printer? I gets the job done (mostly) but I don't feel like dropping the cash on something while I am seeing so many advancements so fast. Though, after I have a new place with proper room I will probably still buy something new anyway. I want a much larger format printer, I am working on a modification (again) to improve my Z space and make it more rigid. It helps me understand it better even if newer printers are not as modable. I have been looking at industrial printers on various marketplaces to see if I can somehow pick one up since they are still way ahead of a lot of the basic consumer stuff for some very specific applications and they are getting old enough people are replacing/upgrading. I really want to build something that can do metal though. Rocket engines look fun. Very, Very, fun. I am going to need a very big barn though.