Now, if you can really get the CEO to extend the budget.... I replaced the .46 AX with a .55 AX, and WOW!! Buckle up! Now it has "ballistic" type performance, and with the stock muffler no less. Much better than 1:1 thrust/weight ratio.
But I think you will get the same power from the Magnum 52 as th O.S AX 55, but the Magnum is cheaper and has ABC setup. Hence, no liner peeling issues.