As to the image plane and lens factor just add the amount of movements to your sensor plane and devide the diagonals of the resulting image planes to find the lens factor.

So your P65+ sensor is 53.9 x 40.4 mm. The diagonal is 67.4 mm.

If you add movements of, say, 10mm rise/fall and 10mm left/right you are working with an image plane of 73.9 x 60.4 mm. The diagonal = 95.4 mm.

So with 4 way movements of 10mm the lens factor is 1.4.

Therefore a 40mm lens translates to the field of view of a 28 mm lens.

If you take the image format into account (i.e. 4:3, 5:4, 3:2 …) the lens factor will vary.