Complex sentence: But they felt they really wanted to make the release "their own", so to say, and the sound quality would improve dramatically, making a pressing from the real masters than from a vinyl EP and an ordinary cassette.
Split into simpler sentences: But they felt they really wanted to make the release "their own", so to say. AND, the sound quality would of course improve dramatically making a pressing from the real masters than from a vinyl EP and an ordinary cassette.