Thought this topic would be of current interest.
To refit the Elite trigger on the HW90 I did the following:
1. With the stock and trigger guard removed I moved the visible forked 'lug' forward with a screwdriver blade to cock the trigger-but clearly not the rifle!
2. I replaced the stock and engaged the fixing screws on the side of the stock. Do not tighten-just locate. To refit the trigger guard , I pushed the safety button forward so it slipped easily on to the 'fork'.
3. Finally I replaced all screws and tightened them up. At this stage I was not able to cock the rifle. Remembering that the trigger was cocked I pulled the trigger and heard a distinct 'click' as the trigger decocked itself. The rifle can now be cocked and fired as normal.
If before you offer the guard up to the gun you press the safety button you will see the catch move forward so the forked lug will be able to engage it correctly.