Making a tool holder: how do you attach HDD magnets to plywood? - Page 2

I decided to make a wall tool holder using a bunch of HDD magnets. Here's an album with a couple of photos of what I made so far:

http://s941.photobucket.com/user/ily...0tool%20holder



I only put one magnet there to test how well it will hold a tool on the other side. The results were disappointing: although the plywood piece that's between the magnet and the tool is thin, the magnet did not hold a large screwdriver very well. So need to improve something, but not sure what. I'll experiment but for now I have one question: what's the best way to attach the magnets to the plywood so that (i) they are attached well but (ii) their magnetic power is not reduced? Is there a glue of some type that would work well? Or do I have to use some sort of bracket on the back of the magnet to press it against the plywood?

Thx