I cut mine on my bandsaw, taped it up good and whacked away!!. Sanded the edge and It's great!
It was like yours just an 1 1/2" too tall.
Look at it this way, you already own one that's too tall and if you ruin it you still need a new one.

Mark

 

I did my own and have been very happy

 

should the windshield be unbolted and taken off the brace that supports it before it is cut?

 

I doubt that you'll have to take it apart. I brought the whole works to the shop, including the attached mounting hardware and the guy at the shop didn't say a word about removing any of it.

 

Sure!

 

Over the years, I've cut down several windshields, but unlike other posters, I do it with the windshield on the bike.

First, cover the windshield on both sides with heavy masking tape well below the cut line. Trace your cut line on the masking tape. Cover the tank, fender, etc with a heavy towel for "just in case."

Using a good hand jig saw from the front side of the windshield, with a NEW fine metal blade firmly in place, start at one edge of the windshield, slightly higher than your cut line, and slowly start cutting to your cut line, which you now follow all the way around. Hold the saw firmly against the windshield so that the saw doesn't jump or wander. The masking tape will protect your windshield, and also clean your blade, and keep the plastic from melting back together behind your cut, and also protect the edge from chipping. Cut slowly and make sure you don't start to wander away from the cut line. Follow the cut line all the way around.

At your start point, without removing the tape, use a fine file to file down to your cut line. Use ultra fine wet and dry sandpaper, to wet file the edge. Remove tape, and you are done.

To use this method, you need to be cutting off enough that both sides of the shoe of the jig saw is on the windshield. It is also much easier if your bike is straight up and down with the front end firmly tied down.