I had the same problem with the U.FL connectors .
I modelled a small tool to solve the problem, thinking it should be used to connect, and then removed.
When I had made a test printout, I realized that it could be left on the U.FL connector. It will stick to the
connector and cable.
I have also made a small 8 mm wrench for SMA-connectors, I guess it will break before the connector is
tightened too much.
