thats why you adjust your trigger so you barely have to pull...with that swtich the trigger can still be up against it and putting preassure on it without firing...and the xsf switch isnt the same exact thing as the stock one...stock switches on spyders and spyder clones are around 250g
It doesn't matter if you have the lever partly depressing it or not. You can do that with the stock switch too. It's mechanical advantage. It requires less force to activate, but a longer length. If you don't think that's true, then you need to read up on simple machines. The only reason the XSF switch is rated 50g is because of the lever. It's not rated at 50g at the button like other switches.