We used the 16K expansion kit which expanded our computational horizon to unthinkable length, like painting the screen black! The standard 1K would only let you paint about half the screen before running out of memory!
The keyboard was really unpractical so we used a mechanical keyboard laid out on top. This improved the ergonomy slightly. Slightly is the key.
My father also built a wooden cradle to protect the beast and dramatically improve its stability. Indeed, without it, even a light impact on the table would reset the machine.
These were the days…