i think JB weld gets way too much credit, and is WAY over-hyped on the package...
i think it looses it effectiveness over time...
and I have never seen anything JB-ed that did not fail or break again the same way as before.

although i do not exactly understand your proposed fix, my poor opinion of JB would lead me to suggest a no-go on anything related to a mechanical function.

but then you cannot really know without trying...

and supposedly billy-bob mcgraw finished out his manly work week by JBing the engine block of a bulldozer back together...in reality he had the cylinder-head of it removed from the abdomen of his charred corpse at the montgomery memorial coroners office.lol