Magnetic Knife Block

This is a wall-mounted magnetic knife block that uses rectangular bar shaped magnets. The magnets get inserted into the hollow tunnels after printing is complete. 

Print two halves of the attached file, support free in the orientation as downloaded. The tunnel is a total of 350mm, and the rectangular opening is 23mm x 10.5 mm. I got magnetic bar magnets from my local Home Depot, but any bar magnet that would fit those dimensions should work (I used 4 bars per tunnel, not 1 long 350mm magnet).