Tube length comment If the interior shaft tube ends are to short, there will not be enough tube to attach a log hose with good clamping. I would...
Do you have an isolation transformer? Galvanic isolator? Try turning off ALL breakers except for the main service breaker. If the GFI still trips...
I don't want to rain on anything here, but I have some comments on that last top picture; Maybe the picture is just not showing it correctly but...