I have been building a second 'HJ Wallbreaker' and have been creating detailed directions. They will come in 2 parts, part one will provide all of the dimensions to prepare all of the dowels and wood, and part 2 will describe how to assemble them. I am taking requests for kits that would provide all wood and dowels cut, marked and drilled, along with eye hooks and line needed to assemble a wall breaker mechanism. Let me know if you are interested.
If you have not already done so, please consider voting for me in the HauntForum 2010 $20 prop contest