Thanks to many who have posted previously and/or have answered questions directly. FWIW, here is my DIY for the E70 X5M Dinan Spring Install. Please only use if you are mechanically capable, there are some potentially hazardous tasks to this process. The checklist above in post #220 provides a shorter summary of the DIY and skips a lot of detail. The checklist is also in the DIY.
[UPDATED TO REV.2, 21Feb2022]
DIY REV.2_E70X5M Dinan Spring Install_argento-xbimmers_21Feb2022.pdf