How to add knife to knife block easily using magnets. The key is to use the new high strength neodymium magnets. I used these from Harbor Freight –Magnets. These from Amazon will work too 20 Neodymium Magnets 3/8 x 1/16 inch Disc N48   Don’t be fooled by the small size, they are very strong and will slam together when pulled apart. They can chip when hit, leaving a sharp edge. Keep away from children. You want just enough magnetic force to do the job. Too much and you will pull over the block when taking the knife away.

First hold the knife you are adding to the side of the knife block. Make sure it doesn’t interfere with any of the existing knives. Determine where the magnets should go to evenly hold the knife. If you find later more force is needed, you can add a magnet in the center. Put some masking tape in the area you want the magnets and mark on the tape. Drill a shallow hole slightly larger than the magnet, When glued in place, the magnet should be slightly above the surface. The tape also protects the area from glue slop.

I used 2 part epoxy. I don’t think super glue would work as well on the porous wood I had.

Epoxy Mix

Insert epoxy sparingly and gently push down magnets until they are just above the surface. 

Let epoxy set and remove tape. You are done. If magnets do not hold knife secure enough, add another magnet. BE CAREFUL if the knife blade edge is exposed beyond the block- you could get cut .