hello lads
it is very true you have to be carefull with these kits
the instructions they send are very good it comes with three diffrent springs 2lb pull ,1.75 pull and one slightly less
i used the 2 lb pull also they send two brass sleves to take up the play in the trigger movement. when you have fitted the bits they tell you to put safety catch on pull the trigger 6 times then release safety to make sure it doesent go off also to bang the but of the gun
if ypu do fit one of these please be careful regards stumpy
in the last year i have gone from 2 shotguns to a s410 air arms