This is a remix with a few alterations.
1) This version is made to screw underneath the counter utilizing 2-1/4" wood screws instead of using magnets.
2) The height of the cabinet mount has been increased to create clearance from the recessed cabinet bottom.
3) The posts on both mounts have an enlarged diameter that perfectly fit the holes in the arm, as the original had way too much play in it causing arm drooping and too freely swinging.
4) Increased post height on under counter mount to prevent arm from coming off when mounted.