RE: PULSE 125 ON FLOATS
I started out with the CG at the aft most recommended point, before putting floats on either one of them. During flight, it became apparent that they were both still nose heavy, as they required a lot of up trim for level flight, and were difficult to fly upside down. That's when I moved the CGs aft, and installed the floats. I've always placed the float steps forward of the CG by 1/4 - 1/2". Flying boats is another story. Small sport ones seem to like the step forward of the CG. Big scale ones are about impossible to do that with, you're stuck with the CG being a considerable distance forward of the step. (The 10' span Martin Mars I'm building shows the CG to be almost 4" forward of the step.) I think a little positive wing incidence (relative to the top of the float or the centerline of the flying boat hull) is more important than step/CG location. A touch of positive wing incidence makes it possible to take off with very little back pressure on the stick, which is what you want. If too much back pressure is required, the tail of the floats or the stern of the hull digs in and slows the airplane down.