John,
I can relate re: the differences between the two OS of each keyboard. I use a Ketron SD5 at home... and on a gig I still fancy the Technics KN2000.
There are times where I just have to "re-focus" to try to remember where certain things are located differently on each keyboard. I am much older than you... I am age 65.
Ron, in Vero Beach, Florida
Donny strictly emotional. I love getting deep into my keyboard and when the OS of each keyboard are so different I lose it. My little mind can’t handle reaching in the wrong place for something.
Who knows tomorrow, things may change -- but I’m having fun.
John C.