The E39Source M5 is now 20 years old!! This video details the upgrades, maintenance, and story of this E39 M5 since my last update in the summer of 2018: https://www.youtube.com/watch?v=p0rALKet3ZU
E39Source website: http://www.e39source.com
Help support E39Source by donating: http://www.e39source.com/donate