I agree with chuck123wapati, as far as swivel knife you will end up with several probably, I use a 3/8” body with a 1/4” straight blade most of the time! For very detail carving I switch to an 1/8” filigree blade. Long straight lines like a border is best done with a large straight blade. I usually always use the same barrel (3/8”) but I am sure others don’t. It really all boils down to personal preference. I have done tooling for over 50 years so I have changed a lot over the years mainly because of the advancements in the tools over time. Barry King is a good choice on tools, I use a lot of Barry’s tools, I also use Robert Beard, Hackbarth, Clay Miller and others, If you stay with quality tools they will last a lifetime and will always be worth about as much as you paid for them. Others will argue that fact but I believe it to be true. Best of luck to you in your endeavors. Rodney