I did just purchase a MadStad screen and lowers for my 2021 R18FE. Had to ride it back to them to get the lowers adjusted (bent) so they would not touch the uppper screen. Oddly enough, it appears the lowers redirected more air about my lower body AFTER they bent them today for me. Though that is to be expected I figure since they now have a second bend in them which allows the air to wrap around easier then before.
Not a ‘clean’ look by any means but think it will work. Just added some Saeng black trim I had from a bike just sold so will see how that changes wind flow as well. Really like the Saeng product.
MadStad is a good company to work with. I am using a 3/4 helmet instead of a full face so get more wind/sound than one might otherwise get/hear. It offers maybe 2” of up.down height on the top screen, the lowers a fixed in one position. Have a Schuberth C4 Pro Helmet coming soon, which I like for wearing glasses.