From my previous post about the HOT safety I finally got a chance to look and find the other HOT gun I had, I found it and found another that I had forgotten about. Test both and the 12 ga. Field Grade would not go to SAFE with one barrel fired, the other a 16 ga. Field Grade would go to SAFE when only one barrel fired and not opened.
I originally was going to take two apart, on that did and one that didn't.
I took the 16 ga. apart and then re-assembled the receiver with the trigger plate housing, all the screws and made sure everything was working. The selector was set for firing the right barrel first, clamped a block of wood to the receiver and fired right side, safety was able to move to safe without doing anything. Safety worked and moved safety to fire second shot which was left side, worked as it should. Re-cocked both barrels and tried again, worked as stated above. I happened to notice that when my finger touched the trigger after firing right side the trigger plate dropped and was able to put safety on Safe. This got me thinking and I went and got another HOT gun that the safety would NOT go back to SAFE when fired but ot opened. I put snap caps in it and fired right side and then pushed trigger forward and was able to put safety on. Interesting.

I like most of you that own HOT guns probable have never had a reason to put the safety on after firing one barrel and not opening gun, but there might come a time as when Marty Stein tried and gun would not to to SAFE after firing right barrel and not breaking gun opened.
Unusual but could happen when under certain circumstances.

If anyone tries this, please let us know.