Your bzb1 picture was focused on the third hand and not the breadboard itself, which meant I could not tell that you had any legends on the risers. Assuming you do have some printing of the pin numbers, that answers that objection.
However, not having two sets of power rails on each side bugs me. Consider this photo from adafruit of a large breadboard:
It has two rails on each side of the breadboard, one red, one black (presumably power and ground). By having the power rails on each side, I don't have to cross wires to the other side to get either ground or power. As I'm breadboarding, I'm finding, I really prefer not to cross wires.
Now conventionally, you could connect both red power rails to the same source, but you don't have to. As I said, you might be doing stuff with servos that need a separate power source to power the servos, so you could have the Arduino 5v power supply connecting to the left red ground rail, and you could have a 9v or 12v power supply connected to the right red ground rail (with both black ground rails connected) that you hook the motors too. Similarly, if you are using 3v sensors, you could have one rail be 3v and the other 5v.