I recently bought a canister of Yonex Mavis 350s to try out, and they seem quite a bit heavier and slower than the feathers and nylons and I'm used to. Their speed is causing a lot of mishits and awkwardness, so is there a non-destructive way to speed these shuttles up rather than giving them up? (did a search in the archives, but nothing turned up...)
Isn't a heavier nylon shuttle faster because a lighter shuttle is slowed down more by air resistance?
dunno. worth a try. another way to do it is not to trim the end of the feather, but trim from the center. evenly on each "feather" so the shape of the overall birdie is the same but with less dense feathers.
Another thougt : you may put a little screw in the cork. It gets even more heavier, but i think it should go faster then.