Originally Posted by blackshire

This is excellent! I hadn't thought of including a substitute parts (Semroc parts) list. Also:

I am just curious as to whether the body tube is a "hard metric" length (300 mm) or a "soft conversion" from 12" (305 mm). Since the Canadians had just begun their (still uncompleted) conversion to the metric system (in 1971, if memory serves) before the Aeronautical Lab Kit came out in 1973 (all figures given in its manual are metric), I wouldn't be surprised if some of the parts in the kit were made to "soft-converted" inch-based specifications using legacy inch-based tooling.