Jack, I totally have to disagree with the rest of these guys, you have a chance to do something great here…
Remove the blade all together. That will still leave 4 blades more than enough to get the job done. Who cares about the vibration? Tell people it’s a blower. When some one looks under the hood tell them, “when I get around to fix’n that welder I’ll tack her back on.” But you got to keep a straight face, then buy some Coors Light with the money you save and sit on the porch and look at your neighbor’s funny with one boot on and one halfway off… Ever one will say, "Looky there kids, That's Crazy Yukon Jack"
... Chevy Pete.