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dangles01 said...
The only down size is different mast required for smaller sized sails.
You can actually rig the 5.4 with a 400cm mast and 35 cm extension. For heavier riders this will reduce the bottom end performance a little bit because the top of the sail get's to soft... at least that's my experience. But the overall softer feel of sail with that setup is actually a good thing.
Also, the 4.2 in that range is listed to need to a 370 mast... I actually discovered that the sail comes with a short top extension cord that allows you to rig the sail on a 400 mast. It's not ideal but it actually works. Probably because the luff of the sail is 395 anyway.
So to sum it up. If you are prepared to take a bit of a performance hit on the 5.4 and 4.2 you should be able to get away with a single 400 mast for anything between those sizes... at least that's my experience...