I hate paying good money for something that I know I can make myself, and often make better than I could buy it. Now this post is no reflection on the many advertisers that this company hosts that sell credible tools and resources. I have bought from them and will again if the need arrises. But if I can save money I will. This is just a short guide to making a quick copper bopper that will last thru lots of beating.
Start with a baton of your choice. I like osage for its density. Round the end to fit the copper reducer, but make sure it's snug. Don't want any wiggle room.
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You can add a little dollop of lead to the cap to fill the space infront of the dowel. Just make sure to not overfill.
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Make sure everything fits good then clean up your surfaces and get to soldering.
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Once the cap cools mix up a little 2 part epoxy and slip the cap back in place to dry. Once the glue sets you can drill a hole to pin the cap in place and grind the pins off (leaving a little to pound flush.)
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The whole project took less than an hour and maybe $6 in materials. KNAP ON!