Ok guys............... (Laugh!)..........
I got up this morning with this still on my mind so I did the mallet-whack thing.
First I marked the sight base and barrel just to see exactly what the heck (if anything) I would be moving. I had a no-mar mallet handy and went ahead and gave it 3 or 4 whacks.
I went down to the range (I have one here handy on my property) and set up my targets and sandbags on the bench. Fired 2 rounds and walked down to inspect. (50 yards) and it was completely off the target. I though OH SH!T!......... Then I realized I hadnt centered the rear back up, so I did that and fired another couple rounds. This brought it back to the paper and I realized I had miscalculated my whacks...LOL!
I adjusted the rear farther, which put it farther to the right than it needed to be and test fired again.
Long story short, I wound up whackin it once back in the opposite direction and everything fell in place with the rear being pretty close to center.
There was no movement between sight base and barrel according to my marks so I guess the barrel assembly moved entirely. At any rate it worked and everything seems fine.
Thanks for the lesson. Maybe i can sleep tonight...........