Well, the only other engines I have are a OS 40FP, 40LA, 46LA and a Saito 1.00FS. I doubt if the 46LA is enough engine to hover, so the Magnum 52 is pretty much my only choice. I'm still thinking I should build in rear servo locations just incase I need the weight in the tail to balance with the Magnum. Have you noticed if the control rods running all the way back from the wing area induce any slop in the control response?