Having some difficulty with reassembly

[MFC]

The way I understand it Marc's method will not work. The sear bar has to be lifted out of the way of the firing pin as the breechblock is closed. Using Marc's method, the disconnector will be compressed, but the sear bar will not be lifted. This is what happens when you actually fire the gun. The firing pin is cocked after it returns to battery.
The method I use to decock is to pull the toggles up only enough to reach a point where it stops against the pressure of the main spring. You can release them at that point and they will stay there. If you hold the toggles in that position and pull the trigger, you will see the sear bar lift out of the receiver. While still holding the trigger, push the toggles back down. There will be no resistance from the firing pin because it does not engage the sear bar.