Freddie.
You will note that on those drawings, there is a difference between the sponson bottoms & the air breaks. That drawing has the boat set up for right hand (clockwise) circuits. Some true scale classes run Left hand (anticlockwise) circuits. You will have to check with the guys or club as to what rules you might be running under. Even if it's just a fun club, you all want to be running to the same guide lines.