I had a Xootr crossrack on my Bike Friday NWT. It was actually pretty versatile and worked well. But since lifting and carrying became a priority for me, I stopped using mounted racks and use a sling bag I wear or attach my Burley Travoy if I have a lot to carry. With my BF Pakit, I can even put the bike on the Travoy and roll it around, lol. I can ride with a fair amount of weight in a bag on my back and not notice it much, but I can't carry a lot of weight up stairs in my arms. For those who won't be carrying the Helix much, though, the cross rack is a great way to haul one pannier worth of stuff with zero wind penalty....Also you can switch it around and mount on the front of the bike as well (but it will rotate with the wheel).