Does your chain eat up the nylon rollers? Do you have a pic of how you shimmed the sprocket? I hate to be a hassle but you are the only person I have found that has come up with a solution. Everyone else has seemed to just junked theirs and gave up. I am about there, but this buggie could be so useful if I could just keep the chain on. If you are standing in the rear of cart, my chain bends the roller arm bracket towards the left rear tire, to the point that on the original arm it has cut into the bracket itself.
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