Complex sentence: He pressed a 4-track Drum and Bass double-vinyl release in 2004 under the moniker "Raiden"; and later dropped this moniker after realizing that another Drum and Bass artist had the same name.
Split into simpler sentences: He pressed a 4-track Drum and Bass double-vinyl release in 2004 under the moniker "Raiden". He dropped this moniker after realizing that another Drum and Bass artist had the same name.