Of course a tamper (probably Pullman)
PS My Barista abilities are at the beginner end. I had not even looked up a coffee site until my machine died (please dont laugh but I have been using a cafe aroma I also found out I have been using a non pressurised filter , more by luck than good judgment as I seemed to have lost the original I ground my fresh beans (from a local coffee shop) in a $100 Delonghi KG59 grinder
although I can probably lay claim to fitting a temp controller (PID) about 25 years ago to a friends machine, though the controller was in those days huge by todays comparisons *!!