Steve that is quiet interesting....
As you might know, I discarded the recognition manual long ago because it is impractical to use with so many new ships already available, and hence my optics mod do no use it. But I would gladly leave the stadimeter in the attack scope if I could edit the recognition manual in a way that it just shows 15 custom ships, for the sole purpose of sending mast heigths of 15 to 30 metres to the stadimeter. It is absurd that the game forces you to have a positive ID of a ship before allowing you to use the stadimeter, but this could prove to be a good workaround....see the ship, estimate mast heigth and then simply open the recognition manual to pick that mast heigth from a list of them, not of vessels