I think I was a bit cruel with my snake in tile No#2 -pulling and joining tail with tongue .I find snakes a bit scary but according Chinese Horoscope,and I chose the positive side, they are very wise and beautiful.
I like when tangle patterns become small optical illusion as is Y-flip so I gave it a try .Many thanks to Helen Williams for coming up with Y-flip and check out her excellent video tutorial on how to draw this pattern. Easy to draw and wonderful when shaded.
I couldn't get my head around this tangle and after lots of doodling scribbling this week I think I finally got it .Drawing instructions are simple to follow and can be found on Margaret Bremner blog