After that I started by mocking up the shelf/raincatcher in cardboard the past week.
As this is supposed to replicate early hebmuller details also the shelf is curved in several directions.
After a bit of tweaking and heatscratching I did get the shape pretty much as I had planned.
After this I just needed to fit the rear fenders and taillights to check bodylines and fitment between all the parts. So far it's looking good! Just some minor adjustments to get everything to fit perfectly.