The wooden box/wooden wedges method is not recommended these days.
There is always the chance of the wedges coming loose and if the box is dropped there can be a lot of force applied to the mirror at those small area contact points.
The cardboard box with stiff foam method seems to be preferred.
http://www.galaxyoptics.com/images/1...structions.pdf
http://www.spectrum-coatings.com/Tel...or_Packing.htm
gb.