Another idea of what I would find to be a fun cache! There are 2 others similar to this that I made, they are just down the road from here.
Finding the cache should be easy, please be sure to re-hide it well. There is lots of room for larger swappable items. For me, it's been years since I've used a traditional combonation lock. So I included directions to open one below, just in case.
Standard Instructions for Opening a Combination Lock
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Turn right three times. Stop at First Digit.
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Turn left one full turn passing 1st number and stop at Second Digit.
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Turn right and stop at Third Digit. Pull shackle. Profit.