xguidojr
the buffetting associated with the triumph screen is usualy an updraft coming from below the windscreen.
when you get a chance to do it safely on a stretech of straight road, stick your hand out palm down to the side of your tank and move it arounds some you'll see what I mean.
the lower wind deflectors eliminate a lot of this buffeting, but also block a lot of air.
sport or fly screen is better at no buffeting,
or do what I did and toss it all together and go with a fairing from a a sport bike designed to go at high speed
you can do a search on fairing, and my username with the search feature. up top.
you can also do a search on windshield and buffeting and see its been "beat to death" in the past.
also windshield has been discussed a whole heck of a lot as well as pros and cons of variuos brands of windshields and various ways to solve buffeting