Jambon's Bikes

I've used a star-fangled nut in a piece of spare tubing - it worked well, but you only have a few threads either side to engage with. I refitted my GB mudguards recently and replaced that setup with an upside-down top cap (to act as a properly sized washer under the steerer, and it's slightly conical too) and a stud connector. Not quite as aesthetic, but there's lots of thread to engage and I don't have to carefully file down the bolt to stop it bottoming out! Will grab a photo when I next have the bike out.