Hi Donglai, If you haven't done any fiberglass repair work before, and need help, get the Gougeon Brother's book; "Product Guide and Technical Manual". They are the originators of the WEST System (Wood Epoxy Saturation Technology), and sell epoxy products. WEST Marine carries their products and probably also has the book. The book tells you in great detail how to do all the necessary maintenance work of fiberglass - filling craze cracks, repairing dings and scratches; and how to cut, fix, and modify anything made of fiberglass. It's the "bible" to get you started. Their other book, "Fiberglass Boat Repair and Maintenance" ($3.00 in my '99 WEST Marine catalog) covers things like mounting hardware, so take a look at this one too. This should make you an "expert" who can tackle any problem or modification you might want to consider making on your Montgomery. ============= Winterizing: I kept my M15 outdoors all winter long. I had a tarp that was about 18 feet long over the mast, and then tied down to the trailer frame. Here in Connecticut we get some pretty hefty snowfalls, and I never had a problem ..... Of course, at the end of the sailing season, I totally emptied out the boat, and stored everything in my cellar. Honda winterizing: About the only thing you have to do is either: 1. Totally empty the fuel tank; carburetor bowl so that the fuel system is dry, or, 2. Add Stabil (a long time gasoline stabilizer, available at NAPA or marine stores) to the gasoline in the tank. This keeps the gasoline from gumming up jets and lines. 3. If you used the engine in salt water, then a run in a test tank filled with fresh water, should clean out the salt water. Since my engine was also stored in the cellar - not subjected to freezing temperatures - that's all I did. 4. Remove the spark plug and put in some preservative oil to mist the cylinder walls and valves. Replace the spark plug finger tight till spring. Also store the engine on the proper side - so that the crankcase oil doesn't escape. Connie