My new portafilter stand arrived, a £3.50 ice hockey puck.
It works well, although it could do with being about 5mm higher so that the portafilter rests perfectly flat on the work surface. That’ll make one handed puck prep easier, which is not that unusual with a 1 year old running round the house. This where the 3D printer comes in useful, as I can make a quick base to build it up.