Today I had an 18" Wind Wings windshield installed at their shop in Plant City Fl. and I really like it. It is their stock sized GL 1800 replacement shield. No problem and easy install. We used the GL1800 "slider?" type windshield insert washers and smaller nuts. The windshield is similar to the F4 shield. As I have both now-- one on the F6B and one on my GL 1800 I will be able to compare them for wear and Optical clarity. I also had them install their mirror wings. They are 2x stronger, thinker and better made than the baker wings I have on the GL 1800. The metal hangers etc are all stainless steel an visually thicker and stronger looking. Good product and they are attending Wing Ding, Reno and several of the south east GWRRA rallys this season.