This is just a mock up and who knows what the final product will look like, but the point is I think angling the corners of this custom case is how you get to 62 linear inches, so I don't think it will fit in an off the shelf suitcase and still be within the required measurement.

I'm sure the Helix with it's bigger wheels rides better than the Brompton, but I have taken several trips to the Netherlands, France, UK and Spain with my Brompton and it has served me well. I was hoping to do the same with the Helix, but I have no idea when I will have it, so I might as well sell my pledge.