Hi - I remember the Yamaha KX and TX ... I had a KX-76 controller, I think it was, and a TX-816 in my rack, many years ago. They were part of my "gigging rig" for a bunch of years back then. Also had a 1-rack-unit little Yamaha mixer, and a Roland D-50 on top of the KX! And a big heavy Yamaha powered mixer ... Ah, the days of early digital . . .

This was back when I didn't even think about weight of stuff; I was in my 30s or so ...

Jim