Don't mess with someones long ingrained instincts. When 'stuff happens' your actions will revert to what you know / are used to doing. My new Moulton came with the brakes switched, different from every bike I have ever ridden in my life. I didn't bother to change it to what I am used to at first thinking that it wouldn't matter, but finally did that recently. The turning point was that I needed to brake a bit while turning on a sketchy/gravelly surface and I accidentally used the unintended brake (the front), and in such instances and it added to the chances I was going to go down. I didn't go down, but my front wheel did an unpleasant sideways mini-skid before my conscious brain told my hands to switch what they were doing. If I had been feathering the back brake instead, things would have been more predictable.