spoiler
I fitted one for a trip up to yorkshire, i was only going to use it for long trip's but found it so good i leave it on all the time,
I am 5' 11'', seat in high position, screen in middle position with spoiler fully forward, i find that i can ride at 65-70 with my visor up and out of the wind,
it is not perfect becouse you still get the air come around the side and buffet you, but a good comprimise.
The other thing which anoyed me was the strap fittment, so once i decided i liked it, i withmoved the strap and "carefully" drilled through the mount's and the screen and pinned the spoiler with two rivitt pin's, can supply photo if required.