Take off CoG has no real bearing on the landing CoG as you have burnt off a large amount of fuel and the CoG will changed accordingly by the time you are on approach, also you will be using a much increased flap setting for landing than taking off and and flying at a slower speed so the trim setting will also be affected.
The CoG scale on the trim wheel is not indicative of the actual aircraft CoG it is only a scale by which you set the stab for take off.
Anyhow who can fly to within two knots?
Regards,
BH.