Pretty sure with Rodgers experience he would not be recommending that set up. The 6.2 likes some rpm and when you throw a 4.0 behind it it lugs the motor down to 3750 3800 rpm and its just not happy there. My last 3 boats had 2.9kw impellors or the solas 3.4. Anyone running a 4.0 with a 6.2 is...
Pretty much the same reason as your boat, They will allow me to do cool ch!t on the fly. Allow me to be the most efficient at cruse and then when I want to cross the lake at 55mph I can drop the tabs a bit and keep the frontend from hopping. Can also help with extreme shallow water take off...