yeah, 4500 is roughly the lower limit. I hope you haven't been taking my comments as criticism. They were intended in a friendly spirit, and without testing the craft yet, I found it slightly hard to believe it could make orbit. That's a problem I've got with the interweb- there is no "tone" in comments, like the way you convey meaning face to face- a smiling raised eyebrow, for example. I'll double check your score, but I think you've got it right. So, 1st place to you! For now... who else is gonna try? EDIT: your score is 4,381.757. I think you forgot to multiply the seconds by 10.