Bruce thats a lot of knives. I guess it just comes down to what you feel comfortable with and if you like the final results. I kind of like the roofer blade for now its cheap and makes a nice straight cut. Goes around curves nicely and cuts through 9oz like a hot knife through warm butter. So for now I am going to keep using it. I might try something different for straps (straight edge cuts) and such when I get to that point. Right now I'm just doing stuff for friends and family so if it aint perfect they don't mind.