53mm Adjustable Palm Tamper

I recently acquired a Breville Dual Temp Pro (not sponsored) and in my search for the perfect espresso, I decided that the standard tamper that came with the machine wasn't good enough. I won't get into the minutia of making espresso, but as a beginner getting a flat 90 degree tamp can be difficult. Similar products exist in 58 mm but the Breville uses 53mm portafilters so I had to make my own as I couldn't buy/find one.

This tamper has a slot for an M3 nut and bolt that are used to lock the