Well....I suppose I should be glad I'm still learning ! From time to time I have used an impact wrench, even though I knew I know better......best to desist I think. Thanks for the heads up.Yep you got problems...…...however your crank is not bent......these cranks do not bend.....they will break but will not be bent. What has happened is you counter weights have gone out of phase......this happens when someone uses a tool like a screwdriver to lock one side of the crank in place to remove either the flywheel or clutch nut. Under this type of strain the crank pin actually shifts/rotates slightly in one or the other of the counter weights. This can be realigned if you know someone with the equipment to do this type of work...….I find it much easier to simply replace with an in phase donor crank from another saw......you're gonna have the cases apart anyway so not a big deal really. You'll notice that you can't achieve a good chain adjustment with your crank in this state. If you adjust to the tight position it will be way loose after a small amount of rotation....if you adjust when it's loose it will be way to tight after some rotation.