Sorry, you asked me how I did it. I don't remember exactly. It was difficult ..as I said in the old post. I remember a paint shop did a terrible job to get the inner trip into place and I had to deal with the mess. I think as soon as you follow the main path- remove the rubber strip and put strip +fins into place - the game is yours.. I remember me building a hook out of a bicycle spoke. Sorry that I am not of big help...next time I'll take a picture.
Martin