Coffee Tamper for Saeco 53mm

I have a Saeco Via Venezia and depressurised the portafilter so then I needed a tamper. While the basket is stated to be 53mm, I measured and found it to be 53.6mm. I have designed this tamper to fit exactly.

The bottom is flat but even with a glass bed it will need sanding to be perfectly smooth.
It should fit most manual Saeco machines.