RE: Tuned minipipe and header
Welcome back, Marian.
I have not had any personal encounter with such an event, but I have a customer, that had a broken header, still during the break-in.
It cannot be a bad idea to add a support at the front end too, or to make a different support, that holds the silencer in its middle, so no added weight is at the end of the header.
My own such engine ran for 35 hours, with no such adverse event.