I Have a BMW E39 530d with a little mods

It have the M57 D1 engine, wich i personally love (yeah, I'm a diesel guy) and specifically i modded the original ECU with dual map memo and you can change it running with a switch, but now i what to go a little far away, and i want to build my own ECU.
I'm totally newbie to this world, I always been focused in the engine and components and wiring harness etc. I made custom wiring for this engine.
i want to learn as possible as i can about rusefi (fab, assembly, programming etc) and apply all the knowledge in my build.
thanks all, and cheers
