I think you are correct. FL 1400mm, actual tube length ~700mm.
I had one of these too. Only way to get anywhere near colimation is to remove the barlow lens from the base of the focuser drawtube. On mine you had to reach inside the main tube and unscrew it (With tube horizontal, mirrors and dropped objects don't mix) . The mirror is spherical, not parabolic.
You can get colimation, but its a struggle. Without a Cheshire or better still a Laser Colimator, you'll be lucky to get close. Once its done, screw the barlow back in.
IMO, Hat Rack or Boat Anchor is their primary function. The OTA does well as an Umbrella Stand in your hallway
Bill