Out of curiosity I made toasted hazlenut orgeat, though I don't think it is really necessary. This is similar to (but not quite as good as) the Golden Gate Swizzle. I used Canton in place of ginger syrup, Rhum Barbancourt 8 yr rum, and strained it as I wasn't wanting the slushy preparation.
Love this beverage, Sother says you can use regular orgeat in place of the hazelnut and the drink won't suffer. It's really more of a float of Peychauds, the top sixth of the finalized drink should be red.