RE: Float length in relation to fuselage length question
Yes, the Falcon floats will work very well on the Tiger 2. That rule of thumb is a good overall guide, and works well for "average" airplanes. The Tiger 2 has a longer tail moment and a lighter weight than the "average" airplane. I have 31" Zeedoo floats on a Cermark Graduate that is about the same size as your Tiger and they work just fine.
Jim