Welcome SteelyPhil!
There is lots to learn and to enjoy here.
Could you help a bit when you post? If you use the little green arrowed reply button on the lower right of the message you are replying to it makes it possible for readers to figure out what post you are replying to.
This also will send a notification to the poster you are responding to if they have that turned on.
It is useful when trying to follow the discussion to see the links between messages as well.