I spoke to the plastic designers on Friday, and they told me they were close to a solution. They're awaiting delivery of some kind of metal insert - I'll keep you up to date.

Once we have a fix we'll manufacture a thousand of them and send replacements to anyone that needs them. There's no need for us to make more than a thousand, because we've changed to a different rotary encoder with a notched shaft and an appropriately modified knob.

Rob