added model variant note (pita)

Signed-off-by: Chris Jones <chris@jonezy.org>
fixed broken test + broken code

Signed-off-by: Chris Jones <chris@jonezy.org>
added missing vehicle spec columns back

Signed-off-by: Chris Jones <chris@jonezy.org>
removed duplicated sql

Signed-off-by: Chris Jones <chris@jonezy.org>