I have spare magnets (5mm x 2mm), so I decided to add holes to the original design. You might still want to use super glue to secure the magnets.
I set the angle to 60 degrees with tree support to make it easier to print. I recommend printing this in PETG, as it will come into contact with the stainless steel body of the Gaggia machine.
The author remixed this model.
I've added some holes for the magnets 5mm x 2mm.