The delivery was very quick. Topcase makes at first glance a very good impression. The material is stable and shapely. Unfortunately, the holder does not fit on a Yamaha original carrier. Have made a 2mm aluminum plate only tinkered a Grudplattform, these screwed to the porter of my scooter and then turn screwed the base plate for the top box on the aluminum plate. The 2 provided rails were unnecessary. After the third opening of the top box lid of the 2 metal pins had disappeared at the lid hinge at a time. This was just reingesteckt loosely and not secured against falling out. So timbered metal pin itself and everything back OK The backup fitting of Topcase and baseplate in turn calls for a self-help, because an M6 screw you do not get just a M4 nut into the outside also is round and thus would spin. Well, that in the base plate fits a M6 nut. Conclusion: If any thing can help themselves, is still well served with this top case, because as already mentioned, this top box is stable, elegant and also the price is right.