tamper station with weight and rubber bottom

my aliexpress tamper (https://www.aliexpress.com/item/1005011731651602.html) came with a basic rubber mat, which I repurposed for this tamper stations non slip bottom. one of my portafilters had a pretty long handle and less weight on the center, so it tipped, so I made this so you can fit some steel plates from aliexpress for weighing it down 20mm depth, 50mm diameter
https://www.aliexpress.com/item/1005008585611023.html