I use the same materials bought for my chod rigs, esp stiff & mouthtrap both in 15lb, i have used coated braids for the boom but prefer the mono, once it's steamed over the kettle it stays quite rigid.
Stiffer mono can but a tad fiddly to tie the hair too, as i found making some rigs recently.
To make life easier when you fold the line over at the end the hair goes on, slide a large or xl sinker on first, keeping it on both parts of the line, this will hold the loop in place whilst tying the hair on.
When the hair is tied slide the sinker up on both parts of the line and over the knot, trim tag end and voila