I'm using a couple of Source 4 LED lustre+ units on my ION. I've got the units set to "Stage" and I'm running the fixtures on the desk in HSI+7 mode. I'm getting some very nice results using the gel selections from the colour picker, however, I am unable to create a strong deep blue. Is this just the natural trade off for the wide range of pastel colours available in this mode or have I got something wrong in the set up.