Optical's been uploading old dubs from the 98-99 era on his soundcloud:
All mad - way ahead of his time. Definitely deserve getting a release!
https://soundcloud.com/https%3A%2F%2Fsoundcloud.com%2Fdeejayoptical%2Foptical-untitled-prototype-dub
https://soundcloud.com/https%3A%2F%2Fsoundcloud.com%2Fdeejayoptical%2Foptical-zoner-virus-unreleased
All mad - way ahead of his time. Definitely deserve getting a release!