Sounds great. I spent half of the product on each ear with nothing left for the third plug. The two parts were vigorously mixed. I waited 15 minutes (not 5) for it to get stuck in my ear and waited 24 hours before drilling. Then I used a small drill bit for the headphone hole. The size of the drill gradually increased to make the hole big enough for the headphones. This was done by hand, without an electric drill. I wanted to increase the bass response and I did it. Photos are attached.
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