Switched oil pressure gauges to the one that originally came in the instrument and it also showed a low reading. The other gauge I baught didn't fit the threads in the block so I'll exchange it on monday.
I don't see why the bearing clearence would cause low oil pressure, but one thing's for sure I got scared as hell when I got that answer. Could there be any other explanations besides the bearings, that are a bit easier to fix, you could calm me down with???