I have the Formosa and I think its great. I can't comment on the Switchback, but I do have the Miniflash. MM makes a great kit. I don't think you can really go wrong with either one. My best guess would be that the Switchback sport would be a little more forgiving model than the Formosa. The Formosa has no self righting characteristics, it goes where you point it. Another suggestion, have you really went to the max with your E-starter? I had one of those too. I really maxed the controls out. I could even get it to do a decent snap spin. I agree with the Li-Poly first. You can gain a lot of performance just by losing some weight.