Hi, this is my first post on this forum. I'm planning on buying a new folder, and I thought this forum would be the best place to come for advice. I've been carrying a Kershaw Whirlwind for about 4 years, and I've really liked the assisted opening feature. I was in a store a few days ago and saw a smaller Kershaw that had the assisted opening and, instead of the thumbstud it had a small part of the blade material that stuck out of the back of the handle so you could open it with your index finger. (I've seen this feature before on Columbia River knives, but I don't know what it's called.) I would like a knife that combines these two features, but in a larger size than the version I saw. I would like a 4-5" blade. Is there such a knife out there?