This product is really well made but I made the mistake of over tightening a screw on one of the clamps that connect the axle to the brackets that connect to the footpegs, and I managed to break one of the halves of the clamp in two. Unfortunately, now he doesn't have the power to keep the wheels in the lowest position. To the manufacturer: Can I order a replacement clamp from you? I love the product and don't want to return it.