[Therion] Declination and the cs command

It seems the cs command over writes any declination that has been set, using the date provided with the survey data. I have a large batch of old data with some accurate local declinations given. Unfortunately these are overridden so I can’t compare my results with the original results. How can I make sure my local declinations are used rather than the cs global declination. Another problem on the same line. I have a set of data where the declination has been taken off the bearings, so the local declination is now 0 degrees but the cs command still adds a declination, moving it way out from its expected line. Can we have therion having a priority for local declinations rather than the gobal cs delinations ? John