Doing Aikido mindfully, an interesting concept. My understanding on doing things mindfully comes from a Buddhist weekend retreat, where one of the many things we were asked to do was to do everything mindfully.
While I know O'Sensei was not Buddhist, I too often use this frame of reference of reference.
IMHO, its similar to the idea that meditation comes sequentially after relaxation, concentration, and contemplation.
When asked about cross training I often say when you do Aikido just do Aikido when you do the other arts just do the other arts. Let them integrate on their own.
I see many people practicing mind-full (with a lot on their minds other than Aikido) and mind-less (being blank as in brain dead), but I don't see many practice mindfully (intelligently consciously present).
So I see a higher level of training when one is physically intent congruent with their mental intent.
Thanks for reading and responding.