Ok, I have a TCS G8 decoder in hand, and a HLW rail bus on the way. Has anyone here put DCC into on of these? Or something similar?

http://www.h-l-w.com/doozie.html

Any tips or tricks?

I did a battery conversion on mine using a Rail Boss 4, My Loco Sound and a Li-ion battery pack. It all fit into the baggage compartment.

I’m doing DCC.

Alright. It lives.
Right now only the rear track pickups are hooked up.
Left to do…
Disconnect dcc board
Lengthen wiring
Hook up motor/rear track pickups/front track pickups
Figure out how to hook up lights
Mount board
Reassemble rail bus
Program as needed