I do, infact.
I have read the BLB refrence, and understand what it is saying. I've seen how it works in several other places.
TEX:(Texture)
POSITION
(Vertex 1, Coordinate X) (Coordinate Y) (Coordinate Z)
(V2, X) (Y) (Z)
(V3, X) (Y) (Z)
(V4, X) (Y) (Z)
these coordinates are based around the center of the brick, so no, negatives are not going to make anything break.
Do you have any way I can message you so that we can communicate this more effectively?