The flatwings that Kenny ties are adapted from old timey flies used in the North East for trout and land locked salmon like the Nine Three (this one is tied on tandem hooks, but you could tie it on a 4xl or 6xl streamer hook:
Fly Angler's OnLine "Nine-Three - week 154 - Part 90
I bet the Nine Three would be a killer down your way for LM bass.
Kenny’s flies are a bit different. Most of them use loooong saddle feathers extending out from the tail. Finding the right ones can be tricky, with Whiting’s Eurohackles probably being the closest. You want long feathers tapering to a fine tip, but wider base, sort of like a long stretched out spear point, as opposed to dry fly saddles which are long but thin across through there whole length, or strung saddle which is too short. Some of Kenny’s flies can be 18” long---it’s a great pattern if you want to imitate large baitfish without making a bulky wind resistant fly using stuff like EP fibers.
Because the saddles are so long, Kenny came up with a way to prevent the saddles from fouling by creating “platforms” to support them, and that’s the key to their construction. Sorry I don’t have a camera, but I’ll try walking you through the steps:
1. Thread base down the shank of the hook. I like a short shank one like an Eagle Claw 254 (Less fouling than a longer hook), If you want to add some flash you can tie in a strand or two of flashabou or krystal flash here, and in between some of the other steps, but don't over do it.
2. 20-30 bucktail hairs tied on at bend for first step of the tail. Use your thumb nail to press down and spread the bucktail into a fan shape from side to side. This will help stuff from fouling and offer some support for the feathers you put on top.
3. Take some dubbing, or pull some fluff from the base of a feather to use as dubbing. Use this soft stuff to make a little bump, or pillow on the top of the hook shank near the bend. This is going to create a little nest for the next feather, and will keep it centered on top of the shank.
4. Take a cape feather, and tie it on concave side up, nesting the stem in the pillow and locking it down. The cape feather has a thicker stem, and will also serve as a support for the saddle feathers. It’ll be shorter than the saddles, but will serve as a support for the thinner more flexible stems of the longer saddle feathers.
5. Tie in however many layers of saddles, one at a time, concave side down, all on the top of the shank, each one tied down a little forward (towards the eye) of the previous saddle.
6. To finish the fly, you can build a body out of body braid, and make a sparse bucktail collar like a deceiver and top with peacock herl. If you want to get fancy you can tie in saddles flat wing, or tent wing style here too over the top of the bucktail instead of herl.
The way this fly is constructed, the saddles will wiggle around in the water, even in slow current. A lot of people will strip it slowly with long pauses, or let it just drift and swing in current.
I hope this helps. If you're stuck on a step, or something's not clear, just holler and we'll see if we can talk you thru it. there are a couple of us on here that use them, including member Riptide on this forum.
BTW, another fly to try along these lines is a Ray's Fly, using bucktail. Short shank hook, body braid body, and three layers of bucktail, different colors usually white then yellow then olive, with a topping of peacock herl all tied on top of the shank, slightly ahead of each other. First layer is 2" past bend, each layer after is a 1/2" longer than the one before it, with the peacock herl being longest at 4" past bend. Each layer is sparse, like 20 hairs of bucktail, and a topping of 5-6 peacock herls. Work in some flashabou or krystal flash if you want in between one of the bucktail layers. It's a great pattern, uses inexpensive materials, and you can use whatever colors to imitate local baitfish, or whatever colors combo's you can come up with--- including bassy stuff like fire tiger or whatever the hot colors for rapalas, crank baits and other stuff the gear guys use down there.