Update
No, I did not, the further I dug into these options, they all seemed to not last or perform well. So, I chose to take a few hours, lots of measurements, adjustments and fabricated a better set of chain tensioner bolts that allowed for finer adjustments, nylon locking nuts etc..
I then rode it myself (300lbs) and towed kids in a sled with it to test it out and didn't notice any chain derailment or loosening.
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