Ben Supnik Wrote:1. I don't think the slope bricks actually notate their angled side as smooth and the flat sides as rough. (Is there a tag or meta data I don't know about here?)
No, there isn't. I'm pretty sure the idea has been mentioned once or twice.
Fun fact: Lego slopes have had three very different bump patterns over the years: extremely coarse, fine grain, and practically non-existent. Bricklink doesn't distinguish them, but they look horrible if you mix them up.