As Colin has said Doug (RNinMunich) dose a lot of research for the members of this site saving them time and effort, also the knowledge he freely passes on is also very valuable.
Like other members myself included we try to be as helpful as possible.
Each of us has different strengths and specialties and are able to help other members in those particular areas.
It is because of the good will of the members that has made this site as fantastic as it is.
I like many others hope to be as helpful as possible and to encourage new members in to this very interesting Hobby.