I previously owned a VW with a Danbury Pop-Top that came and sat in the gutters, the gutters were non-existent where the pop-top sat in the end. Never been keen on Pop-Tops that come too far down in contact with the Gutter.
I have had several looks at the Wanderer roof I have and I still think it is not worth saving TBH and I think a better option will be to.....
....I am not going to share too many secrets, firstly because it will give everyone surprises (I hope) and secondly because I do not want to disappoint everyone if the project stalls or ends for some reason.
As far as the yellow colour goes.... hehehehehehe.
The pictures do not do the rot justice. The rear vertical seam that is painted with the black rust killer has holes you can fit a screwdriver through down quite a bit of it.