Built some Sterling models back in the 60s. Just enjoy looking at some of the history of these nice models.
Sterling Models produced and published a small booklet "Secrets of Model Airplane Building". Originally published in the 1950s, it was included in K Series kits up through the 1980s.
This booklet was expertly scanned into a pdf file by this site's major contributor, David Braun and is now available for viewing by selecting the link below.
Link to Secrets.pdf