I'm going to build a double sliding door for a wardrobe that is about 1.80 long and 1.60 high. Looked a little at Jula's system for sliding doors, these seem to only hang from the ceiling and have no track on the floor. How "wobbly" do you think these will be without a track on the floor? How do you hang the doors when there are walls on both sides? I can't slide in the doors, so I would need to slide the fittings into the track, or is the attachment such that one part is on the door and one part on the carriage in the track?