experience with strida mini?

By the way, I am 155 cm tall, and found strida’s 3 height is just right for me. The only problem that I have is since I have to put the seat at the lowest possible adjustment, the rear rack touches the rear mudguard. If I put books on it, it will press down the mudguard to the rear tyre.I am thinking of something like raising the rack or totally replace it with other kind of rack, preferably metal. It will add the weight, but I can put heavier stuff. I do like brompton’s design of messager bag and the clip-on system at the front of the bike.