One of the “challenges” with the Raspberry PI Hat size/format is that I always lack space for connectors. The 8 x DC Motor controller is an excellent example as I can manage 8 motor controllers, but adding connectors that support right angle is a challenge. It is not that the connectors don’t exist, it is size combined with cost.
Looking at the toy robot I am using I decided to add 2.54 pitch right angle connectors because this allows me space to add 8x sensor connectors as well. This results in a single board with 8 x DC Motors and 8 x End-Stop/Encoders. All accessible from the side offering straight or right angle connectors.
The pictures above show two different ways of mounting the Connectors – just experimenting for now.