OpenLock 2.0 Spiral Stair Infinite Tread

A spiral stair tread, 30deg/8.4mm tall and 38.1R (3in dia/1.75R)
Wanted to set up a spiral stair that could hold figures. Use as many as you need to get as high as required.

Kudos to Printablescenery
http://www.printablescenery.com/product-category/rampage-system/
Rampage
http://www.thingiverse.com/thing:1821631
OpenLock 4.0
http://www.thingiverse.com/thing:1833963
DevonJones
http://www.thingiverse.com/thing:2034428
Cobble Pattern by Sienna
http://www.thingiverse.com/thing:192132