It is recommended but not necessary to use a 2 part epoxy to bond the adapter to the saddle bag. A good example would be 3M 08115. You should also have some knowledge of body work as you will be cutting the saddle bag. Due to many variations of saddle bags these were CNC using stock bags. Depending on the bag slight modifications may have to be done to the adapter. I.E sanding to the mounting face of the adapter or use of silicon caulk to fill in small gaps. Using a quality aftermarket or stock bag will achieve the easiest and best results.