I have been doing som reading and have found that the box can be mounted almost anywhere on the beam can I move it to the center or does it have to be in the stock location???

Interesting question!
Sorry, but the answer is no! If it is not stated in the rule book, then you cannot do it! Be sides, The tie rods have to remain stock in size! If you moved the box, the tie rods would not fit! The only thing you need to do is Beef up the parts that have a tendency to bend or break! Concentrate on what the rule book says you can do! That’s all you need to be completive!