Recuperator,
I am curious as to the type of operation you work for.
During my entire career so far, I have yet to work with
a mechanic/technician /engineer who would not be willing
to fly in a machine he or she had worked on. With very few
exceptions, they have all taken great pride in their abilities
and "workmanship" which was evident by the shape the
aircraft were kept in.
Rigidhead