I wanted to show my son how proud I was of his recent karate accomplishments. So I thought making a shadow box to display his achievement was one way to do it. What better to make a shadow box stand out and give it durability, but to add splines to the joinery.
You could just relay on glue to keep the joinery together however, inserting splines offers excellent joint reinforcement and will allow you to build larger boxes and frames without the worry that the joints might come apart a few years down the road.
In fact, this jig is definitely one that I will use on a regular basis. And want to know the best place to build one. Thats right, I made it at TechShop in Round Rock (www.TechShop.ws