This is not a new pattern, but one that I like to have plenty of and in many sizes and color combos. I often fish Rim Chungs pattern through the foam imitating a midge or mayfly emerger.
I have also tried this as a dropper, but haven't has as much luck as focusing on the foam. His original version I believe is tied with Beaver dubbing, I am simply using a high and dry and don't cord it as much as the original pattern calls for. Also, I usually use two eye spacings between the wing and the eye, rather than just the one as the original uses. There are tons of versions and variations to his pattern out there and I would argue that this one still falls under his original patterns name.
I love doubling the tag end of my starting thread to split the tail. When you pull the tag between the two fibers make sure to pull tight and it should split it perfectly. If not simply adjust one of your fibers the direction you want it to go, then pull tight and secure. If the tail doesn't split enough, take a few more wraps towards the bend until it does when you pull the thread through. Also, this method generally doesn't raise the tail fibers upward, I use my dubbing or thread wraps to do that.
Tie some up in your favorite color combos and sizes and they are guaranteed to pierce some lips for you.