"We showed we were capable of this a year ago against Sri Lanka and then to take the step up to beat a full England side, no 1 ranked in the world, is a massive statement from Scottish cricket".
MacLeod came up with a game-changing 94-ball 140 not out to guide the hosts to 371 for 5 - their highest score in One-Day International cricket - before the bowlers held their nerve to bowl England out for 365 in the penultimate over at the Grange Cricket Club in Edinburgh.
Captain Eoin Morgan said that the defeat will act as ideal preparation for the series, and Bairstow agreed that it will be a completely different challenge to face an Australia side going through an uncertain period following the suspension of two key players and a change in leadership.
The practice, common in football, is something Tim Paine has been keen to introduce to cricket, ever since appointed Australia's 46th Test captain after Steve Smith, David Warner and Cameron Bancroft were jettisoned, and eventually banned for a year, for their respective parts in the ball tampering saga on the tour of South Africa.
Paine denied the move was a PR stunt and said although his team will steer clear of personal abuse of opponents, they will maintain an aggressive streak in their play.
Whether it's in Australia or England, you get big crowds coming in to watch some entertaining cricket with two good teams going head to head. "It doesn't bother me", Morgan said.
Morgan, however, accepted they had been well below the standard needed to win in what was their first 50-over match of the British season.
Everyone knows that this is a different Australia side to the one be faced in the winter but there are still a few of the same players and regardless of the opposition, we always have to concentrate on our own skills first.
The game against Scotland obviously wasn't our best performance with bat or ball - we lost - but these things can happen.
It is barely three months since they were at a low ebb after seeing their World Cup dreams dashed by bad weather and an umpiring call, rubbing salt into the wounds after the ICC made a decision to cut the number of participating nations at next year's tournament.
"We didn't do enough to win, if we had won it would have been a bonus from where we were". Root was duly run out and the game turned again, Scotland striking twice more soon after, removing captain Eoin Morgan and Hales in successive balls.
Scotland's victory will send out a powerful message to the ICC, which voted to restrict the 2019 World Cup to 10 teams from the previous 14, which makes it far more hard for second-tier sides to qualify. "But words are words and on Wednesday we have to show them in our actions".
"It's certainly one of the best games of cricket I've been involved in". This should be a catalyst for more games.