2017 T100 With Dart Merlin Screen And Deflector

I installed my Puig screen deflector today and tested it.
My Marlin screen on its own enabled me to ride 15 Kph faster than without. The screen deflector has added another 10kph on top of that.
I took it for a test on my nearest motorway and tried the different angles of the screen.
I found that the best result is when the screen is level flush with the Marlin.
I thought that pulling it up at an angle would deflect the air over my head more but it just increases the buffeting.
Flush however does not cause any buffeting and gives more protection.
Here is a shortcut to the screen in question:
https://www.amazon.co.uk/Puig-screen...nts=p_4:Puig

 

I only use the deflector when on Motorways and long haul .
Otherwise I just take it off.