RH450 knobs of poor quality - what are durable alternatives

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Dear team,


unfortunately there is an ongoing problem with the control knowbs on the TC Electronics RH450. The quality is poor, they crack after some time, fall off etc. The internet forums are full of users which have the same problem. I could now open a ticket and ask TC Electronics for spare parts. However this will not solve the problem as the quality remains poor. 


Question 1: Why is TC Electronics not capable of solving the issue - especially as the quality of their products is otherwise impeccable -  why is this not bothering TC Electronics that such a small part can't be chosen in better quality - it is obvious that TC Electronics is not manufacturng this spare part but buying it from third party - buy better, rework your specifications!


Question 2: What are the specification for these knobs so I can search for high quality parts myself


Best regards


Harald