Brent, take another look at your setup with regard to the bending force on the original A frame. The originial goes under the deck and transfers some of the force to the deck siderails. Your A frame transfers a lot of bending force to the point where it ends at the front of the deck. That creates a danger of the original A frame bending where it meets the deck. Just a ballpark figure, but that is about twice the force it is designed for. According to my thinking anyway.
If you are going to do something like that extend it under the deck.
Also, to be old and wise, you must first be young and stupid.....