Every renovation or restoration project winds up with a small list of details that need to be taken care of. The project of writing this Restoration Primer column is no different, and I find myself with a short "punch list" of questions from readers about articles appearing in past months. Columns With regard to "Installing Wood Columns," (JLC, 9/89): Joe Paradis, Dolgeville, N.Y., asks: "Are the words column and shaft used interchangeably?" I am careful to make a distinction between "column" and "shaft." Column excludes everything between the porch deck at the bottom to the soffit of the entablature that spans from the top of one column to the top of the next. The shaft excludes the capital at the