using the wooden blocks we cut earlier. First of all we can fix the snare to the cross strut with a couple of screws. Then we need to glue the angled blocks inside the cajon in such a position that they can accept the cross strut and snare and force the snare against the back side of the the playing surface. Positioning of the snare is also town to trial and error, but I like the snare at the top right hand corner of the cajon so that the left hand corner can be played to give less of a snare sound and the full snare can be achieved by playing the top right hand corner. Once these are all in place and the glue has properly dried we can put the back on the cajon. I glue right round the back and make sure that it has good adhesion. Once this is down we can move onto stage three of building a cajon, which is finishing the instrument. How To Build A Cajon Stage 3. Now that your cajon has been put together and all of the gluing is dry and strong we can start to finish the cajon. First of all (I usually cut the back and front a little wider and taller than the cajon itself) we need to take the front and back down to the edges of the sides, top and bottom. To to this I use a few different tools. I usually use a