I have had a few and I don't take mine apart -- but this is because I'm REALLY GOOD at knowing my limitations!
My best shooting buddy has two and has had both of them 100% apart, but then I also know his limitations and he's pretty good.
I am sorry that I am unhelpful, but I will say this:
If someone compiled a list of where to -NOT- send a Model 52 for any work of any kind, Smith & Wesson in 2017 should be the biggest, boldest name on that list. Then, laminate the list.