The man you should speak to I think is Adam Younger on this Forum. His company is K4+ (www.K4plus.com
) and they have recently developed a stepped hull RIB of 6.5m. It has tapered steps to aid cornering stability at high speeds (which is a problem with normal stepped hulls I believe) but still keeping the advantages of steps in a straight line. I think this is all right, someone may correct me!
Adam, If you read this how did you do in Cardiff then?! I would love to take you up on the offer of that ride in the RIB sometime