I am installing window channels on my 3 window. It had the generic channels glued in place which I removed to paint. My parts guy said I would be much happier with the stock channels. Have the Vintique channels for the rear roll up. Basicly 3 pieces, 2 rigid and 1 soft rubber piece that goes on top. I cannot find any pictures or instructions on how to place them. Obviously the rigid go on the sides but how high up? The soft piece goes on top, but how is it supported on the ends to follow the contour of the window?