This is great! I really like the retro look on the example models and the video.

I've never edited voxel models with the spritestacking 2D technique, I'll give it a try. Is it more efficient than placing voxels in a 3D viewport?

On a side note I've been building my own very simple voxel editor in VR you can take a look at it here: https://www.youtube.com/watch?v=tiaGvePo6jo