Very relieved that it still works! I have a buzzing problem with my own DIY amp, but it's only when I'm toucing the casing or very faintly when my laptop (source) is plugged in to power. I doubt that helps, but still... Oh, and the buzzing goes away when I touch the laptop casing.
But yeah, it's good that the tubes and the rest of the fragile components appear to be intact. Is the casing damaged at all?
Oh, and thanks for easily the best audio-matyrdom(ish) story in years.
No damage to the casing at all, and it cost around $50.00 to ship via USPS from Ohio to Washington State.