I'm quite the noob in the forums here, but I have a few questions, if that's okay.
1. Are there limits to the size of the craft? Once I built this monstrosity of a plane, and I was really excited to fly it. I think it would have way more fuel than necessary to do this challenge. (It didn't matter in the end; it crashes the game every time I load it. It's just too big! ) Anyway, a huge craft - is it OK?
2. Speaking of huge craft, if you build one big enough, are you allowed to use an ISU converter and harvest fuel using the drills? Technically you are using the same tank; but it seems really cheaty, and I think it would just be a bad sport to do this.