Look at this, that is the workshop of my friend Reinhard in Germany. He soldered already many parts for me and also made the modified glovebox light.
You can also see the test installation for a controller for heatable jackets for BMW motor bike clothes. He delivers to BMW too.
One of the soldering automatic machines costs more than my 750 was worth when it was new.
I think my parts are in good care there
http://www.bimmerboard.com/forums/posts/150370

BTW: I am just trying to build up a group of soldering experts for LKM and all the other modules for people which are afraid to solder electrics, like me too
Paparon is the first one who offered his help. He has 20 years of experiece in electronics.
http://www.bimmerboard.com/forums/posts/150316
Feel free to contact him if you need help. That does not matter in which board you are posting, as long as you drive BMW E34 or E32.