Frederic, You know I could have sworn I removed something from the top as well, that is why I bought two kits, I thought wow, how clever of them not to give all four sides. I saw the attached picture at
www.bobdrakes.com of his kit it was during a sale, but they are on back order and had been for sometime, very good price they had every seal in the kit you would need all four sides. Hope the photo helps you and it helped me now that I remembered where I saw it. I have all the new seals I haven't put the seals on yet just the one the foam one around column at bottom like you side, I had to make a slice in it to get around the tubes, I didn't need to cut out anything though, I unscrewed this little bar that had 4 screws which allowed me to put the gasket in place. Thanks for alerting me that you replied, keep in touch, I was working on the floor but winter is here and the car is outside and I have done a lot of detailing, so trying to get the front end back on my VW so that I can move it over and push my 47 back in before to much damp weather gets underneath, I do use a cover but has been out for a year already, not another winter if I can help it, should have it back in garage in a week or so, will put heater on and try and stay warm to work on it. I will attach a photo of some of my work
Before
Early on after
Now
more of now all work is rattle can spray, but came out clean at least.
Floor before
Floor after, already more or less for that seal, it's just when I put it on, don't want to have to take it off again for awhile....
like I said keep in touch and thanks, Pete in California