I have four RT's, and I have noticed different fairing types. One type has small air scoops on a panel surrounding the forks (probably the later type, probably during 1985) the other doesn't. I removed the fairing on mine, I don't remember why, but this thread has reminded me that I left that panel off, this may have reduced the heat problem that I had.
The lower fairings on some of my bricks have baffles bolted to them to help direct the heat out the vents. One of them had home made baffles, probably because the originals were lost. One of them also has vents to direct "outside air" to your legs to cool them.
I'm also curious if the RS lower fairing will fit easily.