I have both a R60/5, older design and a R100RS, new design. I like both but have read that yes, they are interchangeable. But someone with more knowledge might chim in here and support or deny that. As far as I know, they are. I have seen more modern airheads post /6 with older covers, and think it does look cool. I do like my more modern ones too on the RS though to tell the truth.
" The people who cast the votes decide nothing. The people who count the votes decide everything."
Straight Out Da Trailah!