I knew of Simon from his work with Carl Palmer. I then stumbled on some Youtube videos where he was doing solo bass versions of songs. I was more than impressed.
I felt the bass part I had in Heretic could be stronger and Simon duly obliged and for the last song, Ancestors and Satellites, his bass adds a lovely melodic pulse through the verses. I only recently discovered that Simon also played in Celestial Fire with Sally Minnear. A small world indeed!