Aha so my vdo boost gauge has an annoying buzzing sound like its loose inside, any idea how to get rid of it or if a new gauge is in order?

You need to use a different valve on the boost vac line that eliminates the fly noise will find a link

When I had a boost gauge in my fabia it buzzed like mad, I put a inline fuel filter in the pipe and then bits of cotton wool until it stopped. You need to smooth the airflow to stop it. You can get a valve that you can adjust with a screw that does the same thing but cotton wool is cheaper lol