I had a wonderful phone chat with Mark at Cal Sci the other day. (Business, geo-politics...) Ended up ordering a Tall size (stock +3.5") windshield from him. Already en route to me. I've read Groo's posts about his experiences with taller shields, and I'm looking forward to posting my impressions.
If I had a quieter helmet (on my 2nd Nolan flip-up...love their form and function) I'd likely not need the taller shield. Thank God these tall 'sails' go up and down on the FJR.