I damaged parts of the unit when I replaced the fader bumpers. Can I buy replacement parts?

If you lose or damage parts during replacement, you can buy new parts.
For details, see the Instruction Manual > [Settings] > [Replacing the bumper for the crossfader].

If you drop parts inside the unit and can't retrieve them, leave the unit's power switched off and disconnect the power cord. Then contact a service center to request repairs.

You can read the Instruction Manual [here].