ke4yyd
In answer to your question, the trigger is mechanical not depending on recoil. However you do need to release the trigger completly after the first shot to fire the second barrel.
As far as the automatic saftey is concerned ,yes a gunsmith or even yourself can change it. BUT it will not be under warranty unless sent to Ruger.This is according to the manuel.
I have 3 Rugers,a 20ga, 12 ga. and a 12 ga sporting Clays model. All Rugers are field models except the sporting clays
model which is not much different except the twin beads and 30 inch barrel. The early models were not back bored, I think that started about 1995.
I have just put up with the auto safety and have learned to flip it off with out thinking.
I have owned them since 1996 and have not had the first problem yet. They will shoot low for trap and you have to
block out the target or build up the stock some.