It was the valve pin that had moved which caused the problem of not firing. Punching the pin back to the correct position and re-tightening the set screw solved the problem.
It was the valve pin that had moved which caused the problem of not firing. Punching the pin back to the correct position and re-tightening the set screw solved the problem.
That's great to follow up with your solution, I could well help someone else down the line.
Too many guns, or not enough time?