Another advantage: The rails can be expanded with additional sets down to the individually required length. I have now ordered my second set, so that I can perform even longer sections. The tracks are similar to tracks of a Carrera track interconnected and stabilized on the underside with a locking device. After use to the rails again with a handle disengage and stow very space-saving.
Conclusion: For the ambitious DIY enthusiasts a great product. I knew Einhell previously only as a cheap brand, but will now attack correctly with very good home improvement electrical appliances with up to 10 years warranty / service. For a reasonable price you get good, balanced products. 100% buy recommendation!