Modified these fantastic spikes and created two different versions. Scaled them up 10x, as well, so I could control the final print size more easily. Both versions have thicker panels around the lower third of the spike, and a much thicker base with strong holes for stitching these onto clothing. I used them to make a festival costume by sewing them into a hoodie along with the adafruit LED setup. My spikes are printed at 11%, 10%, and 9% scale, respectively, as they go down the back of the hoodie. The "thick base" version is for scaling the design below 9%, as it did a couple at 7% for the top of the hood and their bases at that scale came out too thin, so the "thick base" version addresses that.
Printed on a Lulzbot Taz6 (I don't know why Thingiverse doesn't let me choose that model from the list).