I hate to say, but I have never done the Starflier run-through... Never felt the need to prove to myself that I can do it. I'd imagine I could, but everytime I find time to play FL again I don't feel too inspired to do... that.

But for real challenge, try going through some higher level missions with a Mule. Quite challenging. Although I suppose Breslin's Rhino run-through would be a bit harder. I love the mule, but quite frankly: it is a moving barn. And that's an understatement.