I add my nutrient when I add my Irish moss. Doesn't seem to make a difference. Every ingredient has a taste to it. The trick is working within the framework of what each provides. I think sorghum has been given a bad name because it doesn't work as a replacement for barley, however it stills makes a great base for an IPA and other styles. If this is your first brew I might suggest making a sorghum based beer so you can discern what it actually tastes like. Don't assume that Redbridge is the best that sorghum has to offer.