I'm not too familiar with the Mezzo design yet. From what I can see in pics there are 2 small castor wheels on the rack that look primarily to aid in the folding of the rear triangle. Is there a system whereby the Mezzo can roll easily on it's rack. . . does it require a mod of some kind?
Does the collapsing the seat post lock the fold in the same way as a Brompton or is it held secure by some other method?