Of course, it's just personal opinion, and alu remain main focus for this project, but I wouldn't be surprised, if I would choose wooden variant as "main" body for my own device, at the end. Also, it remain viable alternative, in case of signal strength problem being unfixable (highly unlikely, but still - after all, as said, any decrease of signal, in any N900's radio, is totally unacceptable, for scope of this project).