On the road now, so cannot pull files from the archive to show the set up configuration. The idea of adding extension is simply to make less out-of-order conjugate relationships. Just reversing the lens is equivalent to shooting at an object distance much shorter than the designed near limit, thus image quality is guaranteed to decline.
As follows: K2 (for 'F' mount' + CPU), more K-rings (K4/K-5) as spacer(s), 4T (cannot remember whether its glass is flipped over inside the mount), reversed lens.