Just installed the Madstadt windshield on my Triumph Bonneville T120; ordered it online and it showed up about 5 business days later; packaged very well with all necessary hardware and good instructions. Gregs video pn the Triumph forum was a great help also except I used a rubber mallet where Greg used a hammer.
Found using my torque wrench that to loosen the lower fork bolt took about 44nm; the upper took about 30nm; therefore, tightened them accordingly at attachment time. Later, per the Triumph shop manual, I found that the torque settings are 45nm and 24nm.
Per the Mastadt video using the cardboard measuring device, my mouth lined up to the 21 inch line; I was 6' 2" in my younger days; hence, I ordered the 22 inch model. After installation, my eyes sighted about 2 inches above the top with the shield at its lowest setting (1 inch above headlight). Shield was parallel to the front fork. Initial ride around the subdivision had the air flow just flowing on the top of my toboganned head - otherwise bald. Maybe a few more adjustments to fine tune it. Did notice, I could hear the engine better. Later, on the road, above 55, my helmet experienced a significant amount of buffeting; working to get the shield adjusted better.
Have to say that Madstadt Engineering did an excellent job on the precision of the components; all were easy to fit together. Easy to attach and de-attach; without the windshield, the mounts are barely visible.