I'm new to this forum so my questions may be a bit off the wall. I recently bought a Quicksilver MXL II that has a Rotax 503. I weigh 225lbs and hope to convert my aircraft to use floats. I need more power and been told to trade my 503 for a 582 blue head. Can someone tell me where I can make the trade or if there's a better power plant option that'll fit my MXLII?