you don't need to take the carbs apart for the boost bottle. you need to take them off. it's not a big pain in the ass. but it's also not worth it. you'll notice pretty much no difference at all. and you have to cut holes in the engine side carb boots. the holes are permanent so after you realize the boost bottle isn't doing anything for you, other than rubbing against a coolant line or something, you have to either leave it there forever or figure out how to effectively plug up the holes in your carb boots. either that or get new ones.
rejetting is easy, but polaris's are jetted rich from the factory so you can pretty safely leave the jetting alone if all you're doing is airbox mods.
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