Fix for slightly incorrect geometry of 30022

[Huib Versteeg]

The colour 16 one is from the BI and, according to OP, in system, I didn't check this

The geometry of 30022 might still be 1 LDU off from being the most "in system" (71 instead of 72 LDU tall, as I first suggested). With actual bricks there's still a very small ridge left over with the construction below. That would also correspond with the 1.72 distance shown with the raw mesh (69.28...+ 1.72 = 71.00... ). The front/back/top for the older 3145 seems to be in-system for a triangular grid, but not a rectangular one.