I had to deal with the challenge of spiral stair and the challenge of using some Metal-PLA that really didn't like to stick the first layer... I admit that pla is more then 1 y/o but i keep them in a close box with some humidity absorption device
anyway it toke me 3 tries and 4 hour each time first time didn't stick second time the support were to dense and couldn't get them out.... 3th time the charm
![Image](http://i.imgur.com/Xywq41O.jpg)
each step is 0.8 thick and 2mm high
it was challenging but i got a better understanding of printing with supports as i usually avoid it completely but in this case was impossible to avoid