Stitching is optional, of course. Stitching IS the easiest way, but you can use tape, lots and lots of tape, and fore-go all those little holes completely. I've done it, and it works fine. Avoid duck tape as it might rip out some wood, and remove the tape asap, in any case.
Here's a pic - I used clear packing tape, which you can just make out.
Search for stitchless construction....

Dave