I enjoyed solving this one. I was lucky as I understood the concept just by watching the board before to start, so after that, I just needed to optimize a bit. :)
I am still 2 off, here. Giving 5 stars, to a level, that kept me finding new and new 2 offs, for days. Unbeliveable. I hope, I solve it, some day. :) Great tower ! And stinky last two steps. ;)
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One months ago, I couldn't. Today was the day.
What a splendid combination of 77. Love it!