"Grid (Un)locked", Challenge #122

Two in one today!
The Diva's Weekly Challenge #122 about (un)locking grids came in while I was working on an example ZIA for my new pattern BrixBox! (You can see the steps in my previous post and another example here.)
Because we are challenged to play with grids and "grid seeds" I thought I may as well use this one for both purposes!!
Filling the boxes was really fun, unexpected effects occurred! Shading was as always a great pleasure.
Here is the ZIA:

Tangles: BrixBox (as grid), Beelight, Pinch, Demi, Facets,
Emingle, Warble, Équerre and Sampson

Thanks to:

CZT® Geneviève Crabe for Demi and Équerre;

CZT® Nancy Pinke for Facets;

Rick and Maria from Zentangle® for Beelight, Emingle, Pinch, Warble, and Sampson (no online instructions); 

CZT® Laura Harms aka the Diva for this Challenge;

You for reading this post.... and maybe even for leaving a comment!!!

Happy Tangling everyone!