We have expanded the URGE offering and have just completed what is now 3 different hull options.
On the Generation II hull in the center section you can have 18" half round rails (pictured on the urge page), or you can have no center rails at all for maximum edge wrap, or 1/4 round rails for the maximum sheer.
Also each hull configuration is available with Skeg (fin) boxes to add fins.
Combine the Gen. I shape and the addition of the fin option the number of hull configuration options is now 8!!!!!!!!!!!
More details coming soon. All hull configurations are available now with 4 weeks from order to delivery.

The beauty of our new multi hull system is that you get to decide which is best for you. The debate of surfing and squirting elements in a hull design have raged and no one will ever agree what works best so we now offer everything.
Its a game of sheer verses wrap. In principal you want water to wrap around a squirt boat edge. In principal you want water to sheer from the edge on a surfing or planing boat.

For a quick example lets use just one direction the Side surf. Imagine the three diagrams represent the downstream edge in a side surf.
Example 3. Water will travel across the hull from the left of your screen to the right. As it approaches the chine some of it will continue to go straight and some of it will wrap around the corner. The water that is wrapping around the corner behaves somewhat like air over an airplane wing and creates lift. In our case this is actually suction pulling that edge down. The water is "clinging" to the edge like your junior high girlfriend.
Example 2. This is what we are calling a 1/4 round rail. As water approaches this channel it gets disturbed and disorganized and as a result is less inclined to wrap around the chine. The result is that at high enough velocities the hull will be encouraged to plane sooner and be looser that that one night stand.
Example 1. Water will be disturbed as it approaches the outside edge but not as much in example 2. One trade of of this shape verses shape 2 is that shape 2 will be more likely to chip gel coat sooner. Example 1 also crams that extra couple of millimeters of surface area into the smaller width that is necessary to make a squirt boat work. You can see 1/2 round rails in the stern of the Angst.

Now..... imagine the bottom is the leading edge as the boat is sinking down for a mystery move. In principal the more the outside edge is disturbed the more movement downward will be inhibited. So, Shape 3 is best for mystery moves and shape 2 is worst. Of course keep in mind that there is only going to be an effect at a high enough velocity. When entering a mystery move you moving at only slightly different velocities than the water so any effect is very slight. The biggest factors are how wide the boat is and how far the chine is from the outside edge.