Hi Samovar, there are 2 wiggles starting from each of 7 and 27. To assist with the wiggle process, these are the end cells : 3 centre, 1 NE, 16 NE, 28 NE, unnumbered centre on NE side of 14, 22 SE, 12 NW, 6 NW, 29 centre & 8 SW
This was a marvelously ingenious geometric grid with lovely 5-letter symmetry throughout the puzzle which was perhaps spoiled only by the inaccurate use of GREEN to mean marijuana (it should be GREENS). I particulary liked the serpentine wiggles, however didn't find the overall solving experience particularly enjoyable due to the initial lack of cross-checking between answers.