I have an built "Astron Sprint" rocket from the late 1970's. It no longer has its streamer. I checked the rocket plans for the Sprint at JimZ's website and the plans state that the Sprint's original streamer was 90 inches in length, by 1 inch in width. 90 inches doesn't sound right to me. Was that a typo in the plans ? If so, what was the length of the Sprint's original streamer ? Please help !