If you are to use sails from boat with boom, you need to know measurement on 5.0 from mast to rear beam. If sail you find has "foot" longer than this measurement, it will be very hard to trim correctly without a boom.
Or, if you find sail & mast like H16, then get the boom also. If you use boom on 5.0, you may want to rotate rear beam so that traveler is lined up better with block location on boom. For boomless, traveler track is usually straight up or rotated slightly forward, for boom, traveler track is usually slightly back.
For using different masts, note the heights of sidetay/forestay attachment may be different than for N5.0, so the lengths of wires may have to all be custom. You can make estimates from geometry, or use some line to set up mast, mark & measure, make wires to match.
Lots of tricky things to consider, but you're trying to save money, right?
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