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On every catamaran build I see and read about, the idea is to mount the stingers in a twin as close to the inside bottom of the sponsons as possible. Now I've also seen on some RTR and ARTR cats, stingers mounted in the center of the sponsons, resulting in a perfectly straight driveline. I have a HK Flowmaster which is set up this way. I have also seen this boat and others set up the same way doing 90mph. So, is it really critical to have the drives tucked into the very inside corners of the sponsons or not?