I gave a shot at this weeks forum competition , the Voronoi D Tower, but failed to complete a full print. Examples of some failed attempts in photo below.
I'd keep getting to a height of about 30mm then the print would separate from the heated bed. It was frustrating and time consuming. The headed bed had been working excellently from original set-up a while back, with printed pieces of all heights sticking well to it, and then clicking right off when it cooled. I'm puzzled but will continue to ponder it! :(