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.
Thats and awesome design. Maybe think of a version that fits plexiglass tubes? And I got something similar, build by hand not printed, and from that I made a stackable stair tower. I'm new to thingiverse, but I'll upload them as soon as possible,
Maybe you could think of making the stair part only 50mm or so, but stackable, so you could make a large or small tower regarding how many stairs you print. Would give that model some flexibility.