"I use a neat little rule of thumb when using the wx radar in the cruise so that the radar looks forward and up,...."
Being relatively ignorant in this area, I'm just wondering why you're aiming the radar upwards? Don't you want to look at the weather directly in front of you(along track, vertically and horizontally).
I understand that sophisticated wx radar systems auto-adjust for _pitch_ but not inertial vertical path. Would you be able to use your FPV(Flight Path Vector) display, if fitted to your aircraft, to help you determine your inertial vertical path and adjust your radar accordingly?
Rgds.
Q.