Of course full body replacement project includes it's own backcover. *But*, it is not the *same* backcover as proposed separately - they're both feature equivalent, but standalone backcover won't be usable with body replacement's one and vice-versa.

Standalone backcover is made to fit into standard N900's body.

Body replacement will contain different clipping mechanism, as well as changes required for radio's to work on full-alu body. Also, making room for body repl. features require re-working parts of case backside - it's simply impossible to keep original clipping, there is too much "wasted" space in original body.

Just for the record, it was stated earlier in this thread (no fingers pointed, I realize it may be hard to find such details before OP edit).

/Estel