A novel way to generate loops, and although I spotted the main shortcut quickly it is a very satisfying one. I like that it's all about selecting the right tube of holes LOL Looks good and it took me a long time to solve, so 5 stars. The solution looks pretty obvious now but it didn't earlier. After many attempts I figured out what needed doing, not particularly intuitive, but not too tricky to get 50 steps. At last, after many goes I've got it. I kept on missing a couple of techniques to shave off steps. 
Insights