Now you're talking, Rex !
I'm not yet sure just where QCX keyer issues originate. But, I do believe that I have heard them...
And, it's for sure that you have me thinking things about Morse Code that I've never considered before !
Now, I'm researching words such as tactile, auditory and others over at Merriam Webster's !
I think it's wonderful how, after nearly a century-and-a-half, we are still analyzing...and enjoying...good old 'code' !
Keep up the great work !
Thank you and 72 / 73,