Phantom your boat looks great. Would it be possible to take a photo of the hull underneath please?
Why I'm asking? .............. is because our RIB's hull (as far as we understand from the manufacturers) is based on a Phantom 21 or 23 can't remember.
The hull starts deep and ends flat at 18 deg and at the end to wards the transom has a very strange looking short of step in the middle (I call it a chimney since it looks like one) that apparently makes it go like lightning.
The recreational RIB only weighs total 600-700kgs (1300-1500lbs about) and the racing boat about 500 kgs (1100lbs).