Since most of the go fast electric boats, come with, to big of a prop, blade, area wise, from, the manufacturer, the best way to get rid of the hydroscopic affect, if U turn your boat, bottom up, at about a 25 degree angle, nose up, pour some water on the bottom center of the hull, U will see the hydroscopic affect, as the water runs down the in a group affect, on the hull, the water does not want to let go of the hull, which equals, excessive drag. I use 3x3, flat block of wood, using 1500, water proof sand paper, I start sanding on the bottom surfaces, keeping the sanding paper tight, on the sanding block, changing the sanding paper often, with new sheets of sanding paper. When glaze, on the bottom is alllllllll gone, switch to 2000 grit sand paper, and go over all of the bottom of the hull again, after U have done the bottom, with2000, I go to 3000 grit, for the final sanding over all of the bottom of the hull. This procedure, when done correctly, (lots of time) should add, 5 to 10 miles per hour. TRY, the factory prop and see how is accelerates, and drives thru the corners.
On all my boats, I put smaller blades on, with less area, but more pitch, on the blade tips.
I wrote a lot about this, hope I haven't con fused U, if U have any questions, send me a message