I'm working on Lesson #2 and found myself stuck on placing books. As I was placing a book, I considered laying it on an angle against the drum. However, it seems Rotation X and Z do the same thing and rotate around the same axis. Am I missing something or is that normal?
On another note:
In response to placing items within tight tolerances, I found setting the position and rotation adjustment units to very small intervals (.25 or .5) is extremely useful. For instance, PeltFarmWall0# is designed to be placed on the walls in the Farm House ground floor by having multiple angles. It was very difficult to control a mouse with fine enough control to place it properly. By utilizing very small intervals you can drag it into a close proximity and then use the properties window to fine tune. This same process allowed me to place the mounted animal heads at the same angle as the wall they rest upon.
As an aside, I found with my limited experience, an interval of 2 will almost always get you right on point for placement. Very minor tweaking is rarely needed with the sub 1.0 intervals.