Suggestion: EXTRA SOLID BONES --- I would like to see a way to give bones an "EXTRA SOLID" attribute, to reduce the tendency of bones to apparently change length under pressure. This would offer a way of making structures with more predictable behavior. What I mean by this is easier to explain by example. I've seen YouTube videos in which people talk about using "triangles" as if they are immutable shapes. This way, they could be... without messing with the usual behavior of ordinary "bones" in the program.