Arduino Proto System

EDIT: This is being updated as I go so check back.

As I'm involved in an electronics/Arduino/3D printing course, here is my effort to help make it easier to connect things up.
The base board has provision to mount an Arduno Uno, but I use the Nano mounted on a '"Sensor Shield" instead. The Nano is my prefers Arduino.
I've also made some other base boards but they are for my own ESP32/Pi Pico proto boards.
There is room for a small breadboard. A small one is ok as now the main parts to be used are screwed down and have attached 3 pin leads that plug into the sensor shield.
There are a number of mounting modules available, and more to come.
The display I use has an OLED, encoder and 2 push buttons on it. Just make sure you get the 5/3V3 version, not just the 3V3 one. It has a regulator visible above left of the encoder.
The various mounts have M3 brass inserts and are attached with 6mm CS M3 screws.
The mounting holes on the base unit may be a bit small and need drilling out. This allo