My only question to you is: Are you 100% certain that your '52' is truly '52'?
I ask because for years (20+) I thought I was stringing at 'X' lbs on various dropweight machines. Then this fall I splurged on a Wise tension head and quickly discovered that my 'X' was actually 'X - 4'.
Now, I realize I'm taking the Wise as 100% accurate, which it probably isn't, but it is likely closer to reality than my older dropweights.
So, again, are you 100% certain that, when everything is all said & done, your racquet is strung at 52?
"Nobody beats Vitas Gerulaitis 17 times in a row" -- Vitas Gerulaitis, after beating Jimmy Connors on his 17th try.