I don't know about the 330, but the 540 was built with the heavier of the engine range in mind. I tried a .46AX in mine and it's way tail heavy. An OS 60FP made it come out just a tad nose heavy, but that's an older heavier engine. Start with the Ueda. That should come pretty close to the recommended CG. If it's still a bit tail heavy, throw the Enya on it. The Kraft, I would think, would be too heavy.