LeeG,
Check out the inside the waist band ccw belts. They look like a concealed money pouch with two open top pockets. A friend of slight stature shocked the vendor at a gun show when instead of putting a pistol in one and a second mag in the other, he placed a pair of full sized 1911 style .45's in the pockets. Some how they fit in his pants without the typical bulge from the butt of the handles.
As far as the CS Tanto the leather sheath on them has always bothered me. The few times I wore it hug up getting in and out of the car and while seated in a chair, was rather difficult to retrieve quickly. The newer kydex type offers more carry options but I as of yet have not picked one up for mine. Come to think of it I probably won't as I have had the knife for about 15 years. It has become one of many in my collection.
As for concealed folders I find while seated, one clipped into a button down shirt offers excellent access for a right handed person, as mens shirts button left over right. and if you wear a tie it will conceal the clip and butt of the handle nicely.