Hi Lactone - thanks for contributing the buildings in Sacramento. One comment I have since it looks like you contribute lots of buildings all over the world - most local communities I'm aware of prefer you square/orthoganalize the buildings you draw (you can press the Q key in both iD and JOSM, though that shortcut may vary by your keyboard locale) - that makes the geometries more useful and more likely to match what's on the ground. Just wanted to provide that feedback. Thanks!