Are you using deer body hair, or bucktail ? Bucktail won't flair as much.
When tying your bucktail to the slider head do it in 3 or 4 stages, rather than trying to lash down a big clump all at once. It will be alot more durable.
You can wrap some cactus chenille over your thread wraps to hide them, and give it a bit more bulk, and flash. If you want.
Either way it should catch fish, and looks like it would come through wood cover or weeds pretty good....not so sure about chunk rock though.
Are you determined to use hair ? cuz IMO a silicone skirt (glued on the head) would be better for the application.
ok, I think I'm done nit-picking