Ramon, thanks for getting back to me! I'm glad I managed to trace you. I hope you have come back on here as you have left the dark Side and returned to the world of the Flat Four.
Thanks for the info. I still have all of the parts, apart from the double din HU now. My plan was to originally fit 2 single DIN units, one head unit, one PSi3. But to convert a top mounted PSi3 to a DIN mount is another mission also.
These parts are cheap, so I may just get those anyway.
here is the diagram you described:
I can't see how I would fit those. Behind the brakcets that hold my current heater controls on?
And they would make a nice snug fit, with no gap like in my project?