yacht boat cradle

I need to great idea, how to create yacht boat cradle. Due to the Boat Cradle or the blocks, they must be easy to dismantle, or be assembled so that they do not have much storage space, they must be reliable and durable, and easily adapted to different sizes of boats. Their market is dual - marinas who want to attract as many recreational craft for shore warehousing and expensive shipowners who buy a custom made block for their boat. Many welded pyramids, or tripods, are used - but they are convenient only for marinas (it is possible to carry it without any forklift trucks and economical storage), but ship owners and Marine customers do not like such a thing - it loses the marina business.