The Mk.6E Bombsight is the export model of the Meadows bombsight system. This is designed to be used with the bomb spacing controller, so any purchase includes it. This bombsight provides a fixed, stabilized reticle. There is no Norden-style control provided or most of the fancy features the Mk.6C has. This is to provide an opportunity for everyone to have at least some kind of bombsight. This system does not have variable drag, so it is only suitable at lower altitudes.
You will need to use trial and error to adjust the drag value to match the drag of your bombs. Avoid negative mass rockets, they adjust the gravity of the bomb, not the weight.
This item is free to use unless you are in SMH, in that case comply to the relevant patents.
