X-DID is a grid based tangle. Since I am a Zentangle purest, that means NO ruler. So, my finished tile, a monotangle, is just a bit wonky. Well, maybe a LOT a bit wonky LOL:
|White Gelly Roll pen with charcoal shading|
Drawing of a page from an old book with an attempt at an illuminated letter.
And, finally, from Square One: Purely Zentangle, Auraknot with some Ahh added.