Sorehead, It doesn't take long to swap the screens, especially if your using a better array of tools vs. the stock tools and your fingers.
The two rubber grommets that hold the windscreen though . . . I'm not sure how long they'd last if the screens were changed often. If it's easy to find replacements though, no big deal.
A new note to report on the DB. I have a slight buzz that hits occassionally that is the screen. I haven't been able to tie it definitively to any particular RPM, and it's not there most of the time. I figure when I get back to San Diego I'll take the screen off, and put the electrical tape on some of the contact points to take care of it.
My original windscreen did not generate a vibration noise, though I remember many people reporting they had that problem.