A Heathkit IG-72 Signal Generator Part 3 - Do I need parts?

https://wereboar.com/projects/index.php/2024/10/26/a-heathkit-ig-72-signal-generator-part-3-do-i-need-parts/

The device seems to work ok...do I really need any parts?

Some basic checks seem to say "no." (foreshadowing)