Hi..
I think you will find, that the holes in the barrel (outer rim), are tapped into it and are not inserts, which the BBS bolts secure into..
Helical coil kits, should do the job and solve the issues you have..
However: I would not be inclined to just leave the 5 BBS bolts un-torqued and loose.
There are 20 BBS bolts per 108 rim, from memory and not having 25% of them secured and torqued up etc, is potentially a bit of a disaster waiting to occur..
Personally, I would be dropping the affected rim with 5 BBS bolts which are spinning, back to the company you mentioned, that did the refurbs' prior..
Let them sort the problem..
It may be something potentially simple like a tired and worn thread on the Titanium BBS bolts (albeit, I doubt this). But giving them the chance to resolve the issue in the 1st instance, might be a good way to go.
Hopefully, they won't attempt to blame you and say you have over torqued the thread in the bolt aperture or on a titanium bolt..
Best of luck and let us know, how you get on
