I'm considering replacing my fixed two blade with a fixed three blade prop on my hunter 310. I've searched through all prop manufacturers and I could only find folding and feathering props. My present prop is Martec but from what I see, Martec does not list fixed props on their site. Can someone point me to a good source for a three blade fixed prop. I assume that once I locate the manufacturer, they will help me find the right size prop. Thanks. Lee S/V Calaloo