I have a "77" "Sheep's foot" that went into my pocket the day I received it and is the finest pocket carry one could have, in my limited opinion. I appreciate that many folks who have obtained both "77" as well as "15" Barlow knives really are not using them, but for those who are, I'd enjoy their commentary w.r.t. the "using" difference in the two sizes? Is there a reasonable and practical advantage or disadvantage in the size difference from a using point of view?