Honden, your.02 is worth big bucks. We tell operators that the tandems must be all the way back and chocks must be on the rear-most wheels in order for chocks to work properly. We need the impact loading of the forklift truck entering the trailer to have as much downward vertical loading toward the chocks as possible rather than a forward directional loading which tends to push the chocks rather than seating the tire against them. Your point is excellent and this kind of detail cannot be found in many training programs.