Exage 6 speed makes me think it's as early as 88. By 89 most were into Mtn LX or 200/300/400 GS stuff.
I've had RSX 7 speed brifters shifting mtn cranks and gears smoothly. Not sure about newer models.
edit...so there's the problem with some front derailleurs in the video.
Last edited by clubman; 07-31-17 at 04:58 PM.