It seems that my Webra 120 speed has a very small prop driver for the power that the engine puts out. Anyone have a problem with the prop slipping? This is a new engine, i haven't flown it in a plane yet. Here's a photo of the prop driver on my Webra 120 compared to the one on my Magnum 160 and a MA 16x6 prop. The driver doesn't even contact the outer edge of the props hub, or should i be using a different brand or model on the Webra? The engines prop range is 16x8 - 18x6.