Should change to a green light ! Also we recommend not charging with the cart attached.
When you screw the cart in please do so lightly just enough so that it's tights .
You can get the hvd through vaporwarehouse by purchasing the minicron or any of the v2.5 omicron that say hvd on the back .You will match carts by the voltage that your running . So yes with the core hvd combo you can. Run the sr74.at 3.7v you would run 2.4 ohm carts or 1.5 ohm. If you are...
The titanium kiss cart does not follow the normal ohm rules because titanium is in its own class.your 7.4ohm kiss cart is right where its supposed to be also 3.7v titanium will read a 1 ohm range .