MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
It's not about cost or the complexity of assembly, it's more of a long-term benefit. I've built both a Sells and a Prusa (and now a Max), and the Sells had the only fire-and-forget solution for the Z rods. With two motors, i had to re-synchronize the rods countless times (mostly after trying out higher speeds and having just one motor skip), where the Sells' belt kept everything synchronized.