Sweet Rifle!
I have a Stevens 120 that I got from Santa when I was 13. It still wears the Weaver D4 that i got then too. It's still a pretty good shooter with standard velocity ammo. Looks almost identical to yours.
I also have a Glenfield Model 10, with the ring cocking piece instead of the knob. Got that from a P.A.L. shooting team that was getting rid of older stuff they never used. That rifle shoots almost as well as some much higher dollar target rifles I have.
I love the single shot .22 rifles.
I think the known issues are taken care of. If you have any issues or know of another member who is having issues, PM daytime dave. As we head towards the holidays, hunt with your Henry.