How do you define X dimension?
What does it do?
What changes does it affect?
I took some measurements on my boat and it looks like on plane running, my prop is acting like a surfacing prop. Prop centerline looks to be ~ 1" below the delta pad.
I run a B1 28P and it is good on the top end, but out of the hole, little slow. I am trying a 26P 5 blade for more load in 2 weeks.
It is a deep V/step hull/delta pad 25' Warlock world class, 496HO.