I put on the Ernie Ball casters this morning. I went to change the speakers, and the first problem was you had to remove the head to change the speakers. The second more significant issue is my Celestion Blackback G12Hs are 16 ohms, and the stock speakers are 8 ohms. I am fine with the sound of the stock speakers; if I didn't like the sound of the amp, I would not have bought it.
Here is a new family picture of my basement jam room. I know Dave's back hurts just looking at the picture, but even he would have to admit he would love to spend a couple of hours down there jamming.