Astron Scout By looking at the photo of the finished model in the 1963 catalog compared to the photo in the 1970 catalog the following should be noted: 1) The nose cone seems blunter on the older version. 2) The body tube on the older version had 3 vent holes. 3) The fins are swept tighter on the old version. The drawings by Peter Alway seem to be accurate for the older version. The other drawing looks like it's accurate for the newer version.