Hi Marc, Thank you for your response. I don’t think that that I am biased, but I do accept that you have had a different personal experience. I chose to use Dorico’s Spitfire BBCSO Core playback template for my instruments. The problem came when I wanted to add a shaker which used a different playback template. As you said, when you use HALion, Noteperformer or HSSE + HSO things tend to work flawlessly. But I needed to use multiple playback templates in a single composition. As I couldn’t find a way of selecting multiple playback templates I needed to add the Shaker manually. Anyway I have managed to set it up, which is the main thing. I have only been using Dorico for 3 months, having used Sibelius on and off for over 20 years, so I guess this is just another teething problem.