I have yet to complete a knife, but have three knives in process. The first is a skinner and the second two are paring knives. I chose these knives because of material that I had readily available. As of yet I haven't spent any money on materaials. What is a good knife design to make repetatively for practice? I'm looking for one that is realatively easy to make but that will force me to develop sound knifemaking skills.