I fitted them to my 1982 Plus 8 36 years ago - ex John Worrall. I had to remount the brackets to allow them to open and close fully. They look pretty and are of most benefit when the sidescreens are off. I fitted rubber door sealing strip over the inner edge of each and this completely closes the gap between each one and the screen, making them more effective. As there is now no wind flow through the gap the side screens don’t billow out at speed. Another benefit is that they conveniently hold the door open. I’ve seen many in the past wrongly fitted.