Finally installed my Boyesen's this last weekend. Not hard to do, but time consuming because this was my first time and I went slow making sure everything was correct from resurfacing the reed cages to lining up the reed edges, etc. Took it out Monday to water test: idle is much smoother than stock reeds, midrange might be slightly better and topend hit new speed of 75.0 on gps. New top speed may be due to lowering the motor a 1/4 inch (running 26 Fury), light fuel load, cool air temps and perfect water ripple. Filled livewells to the rim and still got to 72. Very happy with results. Can't imagine what a 250ProXS would do on my rig!