If everything else fails, you can always get a chain guide.
Hagenaar on
>shop helped straighten some bent teeth on the front derailleur
I presume mean the chainring. If you have messed up chainring teeth, the chain will derail for sure, especially if it’s a narrow wide. Spin the cranks backward and look closely at how the chain is engaging with the ring. If you bent your ring, you may have bent or twisted the chain too – another cause for derailment.
Your Advent 9s 1x system is cheap and cheerful. I have had no issues with it (using a RaceFace ring on the front and making sure the [clutch switch is on.)](https://youtu.be/uW1lLVtC1NA?si=EZvAcTsTyGQzXFF0)
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If everything else fails, you can always get a chain guide.
>shop helped straighten some bent teeth on the front derailleur
I presume mean the chainring. If you have messed up chainring teeth, the chain will derail for sure, especially if it’s a narrow wide. Spin the cranks backward and look closely at how the chain is engaging with the ring. If you bent your ring, you may have bent or twisted the chain too – another cause for derailment.
Your Advent 9s 1x system is cheap and cheerful. I have had no issues with it (using a RaceFace ring on the front and making sure the [clutch switch is on.)](https://youtu.be/uW1lLVtC1NA?si=EZvAcTsTyGQzXFF0)