It's no big deal really, the hull can support the weight. If you're on grass or sand, you can just flip the boat over. If you're on a hard surface (concrete, etc.) then put down some padding so the hull doesn't get dinged up. Old towels or life jackets work fine.

You will want to have some wood blocks (pieces of 4x4 lumber or similar) to prop up the frame, otherwise the boat will be resting on the mast step and/or jib and traveler cleats when it is upside down.

This can be done solo, but is certainly a lot easier if you have at least one person to help you flip the boat over, place the blocks, etc.

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