Martin : the progress with my robot, with a pi4 now.
The Robot has a web page showing live video, you can even drive the robot remotely!
Alex : DIY tamping tool & 3.2V LiFePO4 battery cheap at Bunnings.
Steve : Partsbox - a free online inventory & mini-ERP. Organise your inventory, BOMs (Bill of Materials), do ERP. All online.
Goto partsbox.com for the online demo. Free version is still quite useful. Paid version has even more features.