Thus far, the most difficult thing has been sourcing the tank. Bought three before getting one that would fit correctly. Early sending unit wasn't easy either, but I think I cracked the code with an A100 unit.
I saw that, frustrating for you for sure. I think I'm going to try to clean mine out as it's newer, need to do that soon, don't think I'll have similar issues with getting correct part as mine's more common