Steve
PLEASE don't call Billy Mr., his head will swell. Sorry Brother.

To Thomas, the OP, welcome. There is nothing wrong with 10-3 and Triathletes.

I prefer a 5-4. If you can handle any of the suggested knives, you will find something that feels right for you.
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Rod Brown
RKS 3846
RKCC CM-123
Whether you think you can or can not, you are right.