I was on the fence about the wind screen but the original was scratched pretty heavily so it looked terrible up close and I ended up liking how it turned out, reminds me of a race bike this way. As for visibility, I am 6' 1" and I dont think I could look through the windscreen if I tried, even in full tuck my line of sight goes right over it, plus on really sunny days it makes the digital gauges way easier to read.
I hadn't thought about the ebay "box of misc parts" approach but that would be a good idea to have some extra triumph parts laying around. Thanks!
Here is a pic before I did the tank and windscreen so you can kinda imagine what it would have looked like.