Any Recommendations For Line-Contact P-Mount Cartridge?

Problem with P-mount, whether it be B&O or the standard type, is that the connection between the end of the tonearm and the cartridge body depends entirely and only upon the fit of the signal-carrying pins to the female receptor.  I don't see how that can be rigid enough to prevent minute movements of the cartridge body during play, which would be a BAD thing.  Perhaps that's why P-mount or the B&O system didn't catch fire, although B&O persisted.

Fortunately the vintage turntables I bought used (6 of them, two of which are linear tracking) all came with the screw that secures the cartridge in the tonearm. The humble Audio-Technica AT-85e and others from that line include replacement screws.