One of the interesting traits about these flies is that they are all tied on a 2499 style hook: creating a larger hook gap, something Shea has been experimenting with lately. The bead in the middle of the thorax makes this fly anatomically similar to the profile of most mayfly nymphs. As well switching between tungsten, brass, and plastic beads gives the fly its versatility.
Thanks Shea for the Samples! Here is a link to Shea's Blog where you can learn far more about his flies.