If I remember right in that thread you said cublover else helped you set up your plane. Go with what works for you, but, I respectfully disagree, That is like putting the mains on a tricycle gear set up infront of the CG,, the tail will drop. That step location could have the plane leaning on the rear of the floats all the time while taxing and will possibly allow the plane to rotate to quickly, this all depends on float desgn also. Although ith a flat bottom airfoil light wingloading plane you could get away with almost anything.


Gravity Storm,
Some more research docs to view
And so does Great Planes http://manuals.hobbico.com/gpm/gpmq1870-1874-manual.pdf (see page 12)

Seaplane supply http://www.seaplanesupply.com/faq.htm