I got one from the 60's that had minimal stress lines but was badly twisted.
Grizzly 45#.
Think it took me 3 tries to get the twist out and it stayed out.
Shot fine.
Was a fun bow. Slow but shot fine.
Only issue was a weird noise. Same on a 50# I got.
Puffs, no matter what the brace or arrow.
Figured out it was limb resonance.

Not string.

The grips on the old Bears work for me.
But I like a thinner one, w a curved shelf, cut past center...........so shoot a different brand.

However, I'd like to try a classic K mag.
My uncle had one, passed a couple weeks ago.
Have no idea if my cousins are gonna keep or sell it.
If sell I'd like to buy it.