Donald MacLean reel

This is the reel though not a reel version of the jig of the same name, also by Peter R. MacLeod. Likely the same namesake though.

In A minor? Debatable since there is no 3rd in this tune (and no 6th either): It could as well be said to be in the ‘Pentatonic mixolydian’ mode.

No F’s or C’s, so A minor A Dorian A Mixolyidian or even D C and G would play the tune in the K: field

If one had to be pedantic A dorian would be the mode, this being a pipe tune and a powerful one at that.

First tune last track on the album "first harvest" by the iain’s: Iain MacDonald & Iain Macfarlane, this tune never fails to inspire me. A simple but mighty mighty tune in the right hands.

Try some passing notes on C & F, for me the natural lean has been for C natural and F sharp, A Dorian…

In what way does a link between pipe tunes and A dorian make sense? If you’d said A mixolydian I’d agree with you.

Simple? Not finding that an issue. On the flute anyway.
Mighty? YES!