Dyson V8 Issue Fix Adapter

My Dyson V8 is old but still works well. However, the biggest problem is that when it's wall-mounted for charging, the dust cover doesn't reset, and small things always fall out. I made a plug for it before, but I had to take it off every time I needed to use it and put it back on afterward, which was too much trouble. Luckily, I had some odds and ends on hand that I could use, so I made a new one. The extra parts I used may not be suitable for you; they are just for reference. Round magnet: 9mm diameter, 1mm thickness. I left a space of 10mm diameter and 1mm depth. Square magnet: Originally a 4mm wide, 8mm long, and 2mm thick magnet, I broke it, so I used the larger part. I left a space of 5x5x2mm for it. The pivot is a straightened 1.5mm diameter pin, at least 40mm long. The hole for the spring is 12mm in diameter; I used a 10mm diameter, 20mm long spring. The screws used are M3x8mm. Even with the screws, CA Glue is still needed to bond them together, otherwise the strength w