> I'd seriously consider a separate cpu card (to allow for upgrading the T1042 or possibly
> even using the T1021)

...or the T1022 I guess ;-)

> and to reduce the number of mainboard layers.

Less layers make for a cheaper design, but a separate CPU card is more expensive than the CPU soldered on the mainboard. I'm not sure if the result would be positive or negative on balance.

> If necessary we can add an SATA controller for the T2081.

...adding to the BOM and complexity again.