Thank you all for your comments. I would have been on earlier to reply but been under the weather this week with a bad upper respiratory infection - almost back to normal now.
@John, listening back I think the fade out at the end was my doing. I probably didn't extend the bounce to mp3 far enough.
@Bjorn, thanks for the feedback. I hear what you mean on reflection and probably would have stuck to a single heartbeat kick. Although it is like marmite
