In order to turn this into a workable model, renumbering of the model can be considered.
You can define the number at which numbering should try and start, by navigating to Model Data > Model Settings > Numbering. For the Start number (at the top left), enter 100 (which obviously defines the starting number). Then, click on the input box for the Next link code, to confirm that it also changes to 100. Select OK to dismiss the Model Settings dialog box.
The renumbering is achieved by navigating to Model Data > Model Tools > Renumber Model, which will open the Model Renumbering dialog box. Choose a direction (viz. West -> East), and click the Renumber button.
The generated numbers will be substantially different from the ones used in the first part of the tutorial, where the model elements were individually captured in a specific sequence.