I have had several of the Magnums and they are a really nice engine as are Super Tigre. I bought three of the Super Tigre 45s for smaller planes. Ran great! Most reliable one I ever owned was the OS .46 in my Nexstar but OS get a little pricey. If you are on a budget, adn we've all been there, buy yourself a Super Tigre 45. Those engines rock right out of the box and wear like iron. I bought three of them when I could afford OS. LOL