Sorry to hear about your problems! Maybe scaling the supports to 85% made them just a bit too thin to be stable? If you decide to take another run at it, maybe use the support-less version and let your slicer make build supports. I printed mine with 3 outside walls and a pretty tight 35% hexagonal (makerbot) infill so the layer adhesion was great. My stand has been sitting on my desk for 5 years now without issue. In fact that 2011 17" MBP in my photos died before the stand!