Analogue Nt NES cartridge slot insert

This is an insert to fix three problems with the Analogue Nt cartridge slot:

1. The cart slot is very loose. This removes a lot of the back and forth wiggle.
2. It raises the cartridge by 3mm. In my experience, the Nt reads carts better if they are slightly raised.
3. It prevents metal-on-plastic contact with your NES cartridges.

Analogue sent out chintzy little plastic cartridge protectors, but all they do is prevent the metal on plastic contact. The loose cartridge slot is one of the b