I've bent more Carlisle blades than I care to admit, mostly back when I first started rowing. I even managed to bend one back "straight" enough to continue using it years later. You just need rocks/posts in the ground/raft frame bars/etc. with just the right spacing to place the force in the spot you are attempting to bend back. With some work, you can probably get it pretty close. It's likely impossible to get it bent back perfectly. And I don't know what the bending back does to the strength of the blade in the long term. But, as I said, I'm still using one I bent five years ago and haven't had a problem. The easiest thing to do is just replace it, though.
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