After your post I start to like Otaki kit. By the way- do you have technical drawings?
I've always liked the Otaki kits. They have drawbacks, such as fairly basic cockpits and the landing gear parts on some of them are not very detailed, but the fit of every one I've put together has been very nice. Now that I'm restoring the old builds I find them even nicer than I had remembered. The exterior detail is usually very delicate yet crisp.
I don't really have any of the super-serious technical drawings on the 109, just some references and the internet. It's amazing how heavily researched this particular airplane has been over the years and how much has been written about it from a technical viewpoint.
Oh, I also forgot to mention earlier that the Otaki kit has the umbrella holder fairings molded in for the Tropical variant. They had to come off for the example I'm building.