The nacra does not have curved hulls.

Converting the mast base is an easy remove and replace part but youll need to get a blind rivet tool ( TO-GH-39031). You should have this anyway as it could mean the difference between an easy 1 hour repair and back to sailing, or going home. Remember to use silicone liberaly to prevent the mast from leaking.

Ive had the H16 and now the nacra 5.2 and there are differences obviously. The 5.2 is more boat and is more technical (I haved tons of questions) but both are a blast.

I recommend joining a fleet in your area that sails similar boats and crew for awhile and or skipper your own boat!
Stay safe