I have that same drawing saved somewhere. Planned on building a few consoles using an MATX case and xbox firmware flashed DVD drives. Still not sure what case to go with. Don't want it to be too big.
The switching regulator is taking some current back out of the battery when it’s not being used, so moving the smaller red pcb (referred as an ideal diode) between the battery and the regulator should be a better solution :)
