Portafilter teline TIMEMORE Magic Cube

I bought this with the hope that it could be used as intended, to help balance the portafilter on the scale and as a holder to tamp with. The problem is that I’m using this with a 54mm portafilter from sage bambino plus, that doesn’t exactly balance that well, meaning that the pf doesn’t sit flat that easily. I can also just weigh the PF directly on the Timemore Black Mirror Basic + scale without the magic cube, as that scale has the rubber matt. So right now, the magic cube is a tamping station. Otherwise, it gets too finicky to take it on and off when using the scale to weight the coffee + PF and then to use the scale the weight the coffee out. Maybe you’re ok with this? This just doesn’t fit my workflow. Maybe a 57/58mm PF works better with this? The other thing is that I thought it was a solid block of rubber (I didn’t examine the photos that well it turns out), it kind of is, but isn’t. It’s one-piece moulded rubber that has a few hollow underneath, inside a (seems like) powder coated aluminium box with rubber feet. It’s easy to disassemble if you get coffee grounds in there and easy to wash. Seems nice to have, but it’s definitely a luxury rather than a necessity if you already have a rubber bench corner matt or something else.