FCR - Boyesen Cover - Bog - old vs new version

My 05' KTM owning buddy has the bog issue with the FCR on his bike and ordered one of the Boyesen covers after working the jetting angle. I'm installing a new FCR myself this weekend. Is the Boyesen Valve the solution or a gimmic?

Is the cover a waste? If not then &%$#@! hasn't keihin fixed it themselves on the newer version of the carb?

it doesnt fix incorrect jetting.

the bog isnt a "flaw" of the fcr.its just needs to be tuned correctly.

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