Thank you Dan for your article link

John DeRosa wrote:
Your question is less about "I have a problem and want to fix it." versus, "I don't want any problems in the first place.

Exactly.

Do late model sailplanes actually have a "factory" grounding point?

Am I correct to assume the best grounding point would be the heaviest metal frame work closest to the instrument panel such as the control yoke or the adjustable rudder pedal track?

So in the perfect world all things metal (especially long lengths like push rods) and your negative instrument buss should be grounded to a common ground point?