P3-64x64 LED Matrix stand, RaspberryPi holder and panel joiner

This is a remix to suit my P3 64x64 LED panel - I actually needed 2 panels joined together to create a larger 64x128 pixel screen.

These are the panels: https://www.aliexpress.com/item/32931309452.html

I used the original stand and created additional new holes to suit the 64x64 panels
The Pi Holder was strengthened and added new mounting hole (note that you will need to add one insert on the panel and 4 inserts to the holder as per the original.
I also created a "joiner" - this links th