I bought a Super K from the early 70s that had been strung for 15 years, When unstrung an compared to a similar bow, it was not the same, it had a set. I got the bow $20 after the owner saw that. It also seemed to draw light. I do not know if it ever came back to its original shape as I did not have another to compare it to after that. What happened next, I picked up a Red Wing pro of the same stated on the riser poundage, they were not even close. Those Slimline Wing Pros are fast, it maybe was not a fare comparison, I gave the Super K away, it is still in use.