Stick surface also does not work, because on the right / left edge are different flow. Whoever thinks that he turns the subsequent train just 180 degrees, is also disappointed because it is the order of the colored squares is different!
To summarize: Absolute Fehlkonstruktion ... faulty design. One can only outrageously expensive Committee, or designate special. Embarrassing thing as the self-proclaimed traditional manufacturer (since 1958) sold as "made in Germany". Following a complaint on my part by email no response. Fits for selling product.
Verdict: Absolutely fingers leave!
PS: And who believes that it is better in the identical film in 65 cm width, is also disappointed!