You are right enough SP, when you get old, you think "I wish this,that and sat and talked more".We've touched on this previously, Tommy, and that rawness will always remain - but in amidst all that pain, your Celtic were there for you.
I wish you're Dad had the opportunity to see the Lions lift the trophy alongside you, but i'm sure he was there in spirit, as well as in all the good times and bad times since.
Peace be upon him and yourself TT