Re: straight leaders for nymphing?
For me, using tippet instead of a tapered leader is just cheaper.
I have a really small swivel at the end of my butt section, I'll either attach the indicator there, or slide it down for shallow water.
Tie on 6' (or so) of 3x, blood knot 2' of 4x - tie on the fly. If I need weight, I put them above the blood knot. so they don't slip. (for Steelhead, I go up one size for both)
it's probably 25 cents or less for the 'leader' vs $4 - lol - yes I'm cheap