Had lunch with my good friend Tommy Badon the other day. Tommy coached American Record Holder Hollis Conway in the HJ. I asked him if he ever used boxes and he said that he did. Said he actually wrote an article about how to construct a good HJ ramp. He didn't like excessively high boxes or spring boards but thought that a double-sided ramp was very helpful for Hollis, especially in overcoming fears of bar heights.