Hey, Mark,I'm guessing you split one of the long pieces . . .
Close. It's hard to describe briefly. I'll look through my photos and make up a small webpage with the procedure on it, if you're really interested.
I'm sure you can get one together scratch. It's not an elaborate circuit; and in all honesty, the divided chassis is a cosmetic feature; it's the physical separation of the PS and audio circuit that keep the noise down. I'll help you as much as I can.
The chassis is Jarrah on this one, an Ozzie hardwood that's much used for floors and decks. She's a gum tree, mate.  I sometimes use Koa, but not for pieces going out of Hawai'i; it's getting too rare. I sometimes also use Padauk, Zebrano, Wenge.
Yah, each tube type will have both a basing type, and a bulb type. These define its physical characteristics, which have to be dealt with by the implementation guy.
Aloha,
Poinz