Yep, I'm a flat-headstock-and-zero-fret guy, and it plays like a dream. No issues.
To be fair, I did tentatively speak to Adrian a little while ago about a new build with the same config and while he did grumble a bit, he said he would do it.
Thanks, Al. No, for a couple of reasons - I don't play fives, but I discounted Sandberg for basically superficial reasons - they don't click with me visually.