Just a heads up ao Springs (read as spring loaded connections or a spring used in a atomizer)
Just because there is a spring in a 510 connector, that doesn't mean the connector sucks. Same goes with a atty spring.
A) the spring isn't part of the electric flow. Check out 510 connectors like the fat daddy. The pin is actually T shaped and the spring, albeit supporting the pin, isn't part of the circuit because the positive wire solders directly to the pin providing a solid connection.
B) the spring is part of the electric flow but is made of exquisite materials. The 2nd Gen stealthvape connectors have a gold plated beryllium copper spring. Works great and doesn't have a moving bottom bit.
Now put a cheap spring acting as a conductor and you're heading for disaster.
My opinion only
Regards
Tony
Sent from my keyboard through my phone or something like that.