I am in Johannesburg, South Africa, I have purchased a GP14 Sail No 13318. Only place I can launch it on a dolly is on our slipway which unfortunately has a boathouse roof. This mean I cannot step the mast before launching. There is a small jetty with a rubber “cushion” running its length. Question – does anyone have any experience/advice on stepping the mast while tied up to a jetty after launching???