Not meaning to sound annoying - but have you read the manual?
It's just it has quite a good section on how to adjust the trigger.
Basically you have to take the frame off the body - no big deal - you then have 2 set screws in the trigger which you access from the top of the frame (they are obvious).
The front screw (nearest trigger) should be at the "top" of it's hole and limits the amount of travel after the switch has been activated by hitting the body (imagine the frame back on the gun - the trigger piviots and that screw hits the body).
The back screw limits where the pull starts - i.e.how far forward the trigger returns. that should be screwed to the bottom so it rest on the inside of the frame.
Really it is VERY easy to get an insanely short pull on the Angel.
However, you do need a new trigger (or some modding) to get rid of the bl00dy side to side play on the stock trigger.