Brian, don't beat yourself up over the rear pad screws; when Dave & I bought the batch of partially stripped 4T's back in the 90's some had both pads, some one & some neither, but ALL had had attempts by Piltdown 'gunsmiths' to remove the pads without warming up the solder! You can imagine what the screws looked like. On top of that some of the pads were damaged as when they didn't come off easily our heroes decided to try to smash them off with a hammer. We spent hours tapping dents back & dressing out bruises! In fact some were only fit for the scrap bin.....
You've done a great job on Seaspriter's rifle.