I think this challenge is great for Laura's goal of getting 200 entries, since there's almost no actual challenge factor (not like that's a bad thing) - just pick your favorite tangle and jump in. My favorite tangle is Mooka...so many delicious, swooping curves ^_^ So, here's my fairly simple 200 Mooka tile.
|Tangles used: Mooka...duh|
|First do a seed grid like Mi2 or Summer Sitter, then add 4 dots in the centers|
|Then follow the curves of the sides of the seeds to make "pinwheels" on every other section.|
|Double them up...|
|...And add the secondary ones behind them.|
Here it is in action with some shading. I used regular pencil to shade over the marker as well and was honestly a bit surprised on how nice it looked. I think you could also add extra lines at the points where the 4 "bands" converge to make it look even more woven...but you'd have to be pretty precise in the beginning to make it look neat. Ah well, neatness is overrated. ^_^
|Tangles used: Heavenly...again, duh|