Rhodysail has part of it wrong. Crew 130 -135 has to carry the actual weight between 130 and 135 (not half) and then 7.5 kg. If you weigh 130kg you need to add 5kg+7.5kg=12.5 to use the large sails or use the small sails and no weight.
• Crew between 130 kg and 135 kg may use the large jib and large spinnaker and then shall carry extra weight equal to the difference between their actual weight and 135 kg + 7,5 kg.