Shoot it first.
I have an Interarms PPK/S (or "Ranger" PPK/S) in .380, but the principle is the same.
I have never had an issue with slide bite. I did, however, have an issue with the safety engaging from recoil (rare, but it happened), so off to the 'smith it went.
You won't know what modifications, if any, are necessary until at least one range trip. Take a few hundred rounds of target ammo, and at least a few mags of your chosen carry ammo. Make sure they all feed properly, check for any malfunctions, etc.
If you have no issues, don't mess with it. If you have malfunctions, then obviously you know what to fix