I did the Thompson Center "Hawken" way back in the 70's. Like you I got gifted the kit, the difference was it was unopened. Very much like yours but with a patch case let in on the right side cheek of the stock. Had a set trigger which I liked and it was very accurate out to 200 meters. Being left handed it just wasn't a good fit. Excellent restore you did, makes me wish I'd have kept it to display. Have fun with it.
Some of my most creative moments have been when I've had to cover up an error in my woodworking.