Headfi's CosmicHolyGhost gets credit for finding this article explaining how to balance your Ocharaku Flat4. Ω is a BIG fan of the Flat4 series, especially KURO and KAEDE.
NOTE: the article is in Chinese. All hardware modifications to the Flat4 will void your guarantee.
Cymbacavum: In support of the DIY CIEM community in Japan
If you're a fan of custom IEMs and dig really cool projects, you owe it to yourself to check out Cymbacavum's latest article about the Japanese DIY CIEM underworld.