I'm planning to use magnets to attach my chest armor as well. Question for anyone who's used washers inside the vest, rather than magnets, to keep cost down: what pull strength have you used in order to keep things secure? I'd like to use this method if it's cost effective, but I don't want to order magnets that will be too weak.
Also, has anyone successfully used magnets to hold the collar/back armor to the vest? I'd hate to have the convenience of the magnets, and avoid making any holes in the vest, just to have to do it for the collar/back anyway. Any pointers would be appreciated.