Well i ended up fixing the trigger, there is a small lever that actually presses the micro switch. this lever has bent a little, ( probably from me pulling it with some vigour while screaming "fire you SOB". ) there is a stop above the level and the now bent lever was hitting the stop before pressing the micro switch. A little twist on the lever and back in business. I am a technical person, have been for 30 years. This x52 is NOT a well built product. I suspect all the mechanical parts were cobbled together to match the bag of switches the purchasing agent had managed to round up that particular week. thanks for the input.
The other one that is "worn out" is worn out electrically, there is no smooth increase or decrease in the outputs, they are up and down randomly with only a vague trend between high and low.