I used a pair of smaller pliers, the kind whose jaws have two flat opposable surfaces. If you don't have some like that they sell assortments of pliers kits at Lowe's and Home Depot for not too much. I wrapped the mag lip in a layer of Post-It Note. I had to hold the mag in my lap, get a good grip on both the mag and pliers, and use some muscle to bend it correctly. I started to try the "hammer tap" method, but decided against it.
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