I posted this on OTT as well because this seemed to be a common problem with these tractors.
I could only find 2 other inspection plates both marine applications, one from Australia (and not available here) the other was too pricey.
As I said before, I found the tank clean AFTER I installed...
After multiple filter and fuel pump changes I expected to find material blocking the fuel outlet inside my tank but.... my tank was clean.
I think I have an occasionally collapsing or pinched fuel line (it's 15 years old) so the back half of tractor has to come off which I was trying to avoid...