I was not planing on being very active on the Forum at the moment, but I had a few minutes of fun making a new exemple 
As you said, the easiest way is to make the PlaceTime a bit longer in the TransportLink. If you want to make it look a bit nicer, you can adapt the movement of the operator for this transport by adding a new routine in the Programm tab (see page 22: Process Modeling Resources Manual | Visual Components Academy )
The more realistic way, but a bit more complex, would be adding the products one by one with a work statement in between. To do that, you need to have one product per step in your assembly. You can use the Auto-Assembly Addon to do that easily (check the demo video or pdf in the forum post). Then in a while loop, add one step at a time, do a work statement and check if the Assembly is full to be able to break out of the loop if it is.
Here are the 2 exemples: