Brand new, learned and practiced everything I could with this wonderful radio, though it seems that there is a program missing, it shows up in the manual but the feature is not in the radio it is called "Trim Offset Memory", it is suposed to be the main item for using multiple airplanes, (if missing cant do such thing?

If you have digital trims, you won't have offset memory. Its built in.

If you have the 8103DT system, there will be no trim offset function, as the trims are automatically stored for each model. This eliminates the need for trim offset.