Testimonials Press Links Contact       Pieces     Stool to trolley     Attaching the bass     Trolley to stool     Rolling     Sitting How it works Trolley   I recently purchase one of your trolleys, and I must say congratulations. It is well designed and built, and very comfortable. I have used it for a number of rehearsals and concerts, and have never failed to get envious comments from my section mates. Thanks again for a very intelligently designed product. Raymond Irving United States, MD   More reviews.. © 1999-2016 Double Design of Scandinavia AB, Sweden, Tel +46 707 18 16 20,