Helmut, hopefully you took my comment about "pointing out your mistakes" in a funny way. I know how we sometimes feel better telling people what we did wrong before they tell us.
I have a Heller Lotus 49B that's been half done for years and it's been so long now I don't know why I haven't finished it. I'm guessing I got tired of the finicky bits and took a break. Think I have a Brabham waiting to be built too. As mentioned, Heller has some different subjects but a very different kit to build than others.