Mark, she has a limited top speed of 28kts for the purpose of the P5 license. From the pictures I'd say she is also only doing about 20 kts so that explains why she sits so low. Redbay have built a few of these boats also with the tubes at different heights, so I guess the customer can decide on speed vs stability. Even at high speeds they are still very heavy and stable boats but they can be fun too!! The shear scale and beam of them is unreal and can't really be appreciated from a picture!!
Here's a pic of Molly James, her tubes sit higher, and she doesn't have a limited top speed, but essentially she is the same spec as "Mischief".