Now as for night time, I'm not sure how the same bomber would have both given existing m3d's, so I'll see what the Major comes
I see!
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As to the M3D where the bombsight textured object is defined, you can clone it as next Cocpit file and hexedit the texture name and eyepoint value. Then just add next bombsight view row at the airplane XDP file, with new relevant wiev value. This will give you bombsight view switching. For more see the Horten add-on.