Soooo, I'm an idiot and I dropped my bike when I was putting it away. Unfortunately, I bent the shift lever. Because I couldn't just muscle it out, I bought a replacement. Now my problem is that I'm having a bit of trouble getting the damaged part off. I tried a smaller handheld hex key, but that didn't do anything. So I'm wondering if I should get a bigger one to try for more leverage or take the power tool approach by getting a hex bit for the power drill. Help?