there was....
but it was lost in the switch-over.
Remove the frame, trigger and board from the frame. Knock the 2 pins out that hold the switch and pull that out.
Look on the two ends of the casing...there are clips that hold the casing together. Use an Xacto blade to lift the tabs.
Now that the casing is apart, push in the button that closes the circuit (trigger contacts it) and look to see how the brass contacts touch each other. You need to bend them closer together to make the switch lighter or spread them apart to make the switch more resistant.
Reassemble the switch and reinstall.
Sorry I don't have a pictorial for you but that's basicly how you do it.