RE: Float setup??
We all have "Rules" which are really guidelines. Your floats will work as shown.
They may be "tuned" to perform better if necessary.
As jrf pointed out, if you get blowovers more than any other ninny trying to taxi on a windy day, your floats may be too close together.
If your plane does not want to take off and the transom of the floats is dragging in the water when you try to rotate, increase the incidence of the wing.
If the plane gets all squirrelly just about the time you think you have flying speed, the floats may be set up with too much incidence, making the nose of the floats dig in.
Your floats appear to be well within all guidelines for a starting point, and I'd give 'em a test flight or 2 before tweaking anything. There's a pretty wide range between too much incidence and too little.
Just be sure that they are parallel with each other when looking down from the top.
Taxi and Start your takeoff run with full UP elevator. This will help keep your prop dry.
When the plane pops up on top of the water, relax elevator and let it pick up speed. Once it reaches takeoff speed, breathe a little back pressure on the elevator and she should lift off. Don't horse it off the water or you may have to take a boat-ride. You will not be happy if that happens. Whiskbrooms do not work well on the lake surface.