This is pretty close to my take. We agree there is no past, only our individual perceptions of the past.

Where I may diverge is in the significance of emotion. Our perceptions, both past and active (present) are colored by emotion. Every perception can be changed based on our emtional state.

I also thin every decision has an emotional component, in that we are constantly deciding (and then acting) based on a perception of a desired future state (an expectation), and that perception, as well as all of the risk assessment and perception of past events and present state - is all actually determined by our present emotional state.

So we are emotional beings, above all else. Even those we consider to be "logical" are just emotionally attached to and comforted by a sense of order, so their choices and actions reflect that attachment.

Change your emotional state, and many of your perceptions may change, past, present, and future (expectations). This is why psychedelics used in therapy have been so successful - they free us from overwhelming emotional states, long enough for us to get a glimpse of being free of that emotional state, and experience a different emotional state and all the changes that go with it.

Being "mindful" is just trying to experience the present while tuning in to your own emotions.

I could also argue the present doesn't exist, as by witnessing it, we have already moved on to a perception of the extremely recent past, but enough for now - thanks for your thoughts!