I bought a 950T last May and had to make some changes to be comfortable with the windshield. Now that I have it I wouldn't have it any other way. My one ride with windshield removed resulted in a wasp getting on my face under my helmet and stung the hell out of me, took a week for swelling to go down. Heck with that!
So what I did mirrors the results of many others.
1) I have a full face modular helmet. Stock "low" windshield for my 5'10" resulted in too much air buffeting the top half of the helmet. You want the air blast to just hit above the visor or face opening. Buying the Yamaha "mid" height replacement plastic 5S7-F83H0-U0 was absolutely perfect for my height. Drive with open face so lovely, and still see over it. It only adds about 4" to overall height because part of the measurement of windshield height is lost to the fact it comes down an inch lower over the headlight.
2) Lowers. This is a hugely important part of the turbulence buffeting you around. A must do. I got Memphis Shades 2350-0143 and mounting kit 2321-0166. Mounted as high as possible up behind the windshield, angled back to match curve of windshield. This creates a fairing like front protection and stops that air coming under windshield corners deflecting off of tank up into your shoulders and helmet area.
Without the lowers a highway drive feels like a boxer is using your head as a speed bag.
I tried mounting windshields at different angles and other stuff. The best rider protection came from stock mounting angle, higher height windshield with lowers. Just buying the replacement "glass" from Yamaha was best cost and look option for me.
The only downside I found is wind gusts and buffeting off the bike is a bit more because of the larger "sail" presented to the wind. I noticed no performance or top speed loss over stock. Way more comfortable in a pocket of protected air.
Of note: the lowers I got are long and about 4" wide (tapered design). I angle them back so not so square to the wind. I also have them mounted high, until slightly behind the windshield (no gap) .
Reducing frontal area presented to the wind greatly reduces the sail- buffeting effect from traffic and wind. Having such stable bikes as these helps too.
I put on the Yamaha driving lights bar and now lowers don't fit. I simply rearrange the clamps to position the lowers more to the rear of the forks so they tuck up behind the back of the lights. Some cutting of the plastic lower is required for it to slide up high enough, to clear the clamp on the fork if I remember right.
I hope someone finds this useful.