OP; Very cool! If anyone asks, suggest telling them you are going rockclimbing... or that you are going to pull out tree stumps. ;-)

On the side, I would be tempted to take the welded up prototype (or maybe a 36T one instead of 34T) to a CNC shop and have them make a template in their computer... betting they could reproduce them in alloy for reasonable(sic) cost to resell to all your fields look to also pull up tree stumps. Could you be looking at a second career or a home-based business opportunity?? Thus another emoticon earned ];-o)
/k