I am re reading Big House, Little House, Back House, Barn, in it on page 143 there is a picture of a crew working timber, ca. 1900. The top surface of the timber appears to be just just above the knee, 20-24". That is about 10-12 inches below what I typically position my timber at. Many times I feel the 30" I work at is too high. It is good for some task, like layout, but cutting is usually more comfortable at a lower height, which I seldom take advantage of. Regardless the height, I find the slick used at any height without encumbrance, the body adjusts easily. I find no reason to not use a slick at a lower timber level, actually I find myself standing up on top of the timber some times.
