Up a Tiffy with rockets offline.
Enable the lead computing sight for dive bombing.
Climb to 2k.
Fly level until you reach max speed.
Turn around and fly back to the feild.
Find one of the drone tanks and fly at it.
When you are 2k away start a gradual dive at it.
At 1k Alt-S to capture your screen. The green cross should also be on the tank.
Take this screen capture and open it in an art program.
Where the green cross is in the Mk2 reticle below the default center dot, insert a second center dot into your Mk2.bmp reticle file.
This will corrispond to about the 5 degree change when the reflector plate is tilted to lower the dot.
HiTech could coad this change but why when you can put a second lower dot in your M2.bmp file.
Bottom of this page has a picture and explanation:
http://forum.axishistory.com/viewtopic.php?t=17850