It's actually quite hard to build a boom tanker; Boeing's most recently one has been a disaster for the company. https://en.wikipedia.org/wiki/Boeing_KC-46_Pegasus#Flight_te...

"If Boeing can't do it, it must be hard", is that what you're saying? Are you implying that Boeing is better at building aircraft than Airbus (or really anyone else)?

I said absolutely zero of thise things. I said building a boom tanker is hard.

Sorry about the misunderstanding. It sounded like "so hard that even Boeing has problems", if you see what I mean.