hi all im after some advise on adjusting a trigger on a friends hw 97k, at the moment when cocked as soon as you let the safety catch off the gun fires or it is so light that the slightest knock will fire it.i have tried unscrewing the adjuster just behind the trigger and it does not seem to make much difference,in fact if the screw is removed it is still dangerous.is there a knack to adjusting these or is the trigger faulty,many thanks alan.