Rod wrote: Contrary to your "surprise" (see below) about my not knowing specifics regarding your boat, allow me to issue an immediate declaration that NO ONE here should ever be amazed by the depth of my ignorance -- sometimes it seems (even to me) to be as vast and deep as the Pacific. On the other hand, there are sometimes mitigating circumstances to my ignorance. _______________________________________________ Brian replied: I'll second that motion...notion...whatever. It seems to me that one thought that occured to me when I first heard of there intended use aboard the Africat, was that these units are designed around the idea of 25-30 plus knot boats. And so the prop sizes and RPM's are geared for these speeds as well. I don't get the feeling that the majority of PowerCat cruisiers really want this capability of 30-40 knots, but rather the economy and medium speeds of 15 to 25?? Now being forward facing, the props are unique for these IPS units, and likely there is not a great selection available. So how does one get these units to operate efficiently at speeds slower than their intended design range, and without a large selection of prop sizes to accomodate??