When I opened the tap, find that the three screws are damaged, and cant use the screwdriver as normal. I never opened the back tap before, so it means that Teenag Engineering sell me this unit it in bad condition. Now I have not warranty.

I will try solder the input line socket, before try harder options for replace the cardboard.

I would recommend users check their units, and try unscrew the screws before and avoid surprises.