Spares - The 25 seacraft seafari has a 25.5 degree deadrise it's crazy too.
http://www.classicseacraft.com/Seafari25.htm
Navatek LTD in Hawaii spent 5 years and some ungodly amount of money tweaking the hull design on the 25 seafari to develop their 9meter SAM Unmanned Surface Vessel.
http://www.navatekltd.com/sam.html
This is a Utube video of one of the test boats loaded down
https://www.youtube.com/watch?v=ln3Y1A_RNCM
I got one of these sitting behind my house now . . . : ) Waiting for a motor ( and my kidney stones to quit )