After sending back the damaged RM1X, I found another one. I couldn’t resist.

This time it looks like it’s new and I paid 150 €.

One of the encoders doesn’t work, but I can adjust the values with the +/- buttons anyway.

The step buttons are much more responsive, but still not perfect.

So I will probably have to have them changed.
After changing them, how long still they start to go bad again?

I read somewhere that with some Yamaha gear (specifically, the A300/A4000/A5000/SU700 samplers) even if you change the encoders, they will eventually stop working again after a while.

Is this true for the RM1X buttons and encoders as well?

Apart from this, does anybody know how to check the firmware? I’m aware that there was an EPROM with a firmware update released, to fix a problem with sequencing external gear. I could not find a way to check the version of the firmware on my RM1X.