It's unusual to get a response like this from Hobby Services. In fact, I've usually found them to go above and beyond their normal obligations.

Who did you speak to in person? You might keep asking for someone different until you get a different answer.

Also, what was your disposition when you spoke to them? I know I'm a lot more flexible in helping people in my job when they approach me with a a good disposition. Not trying to turn the situation around, I just know situations can get frustrating and I've unloaded on some support people at times.

It's just odd. I've run that same engine with the same fuel and looked inside after a couple years and seen no rust problems whatsoever. Of course it is hot and very dry here in the summer, maybe that makes a difference.