@dover , right on.
@rauliruegas exactly, overall distortion levels are lower with Lofgren B except at the very innermost part of the record. Modern records are not cut that far in. Som older records are but I do not notice significant problems with records cut all the way in and I Use Lofgren B religiously. It is tedious setting up a cartridge correctly especially if you are trying to change alignments. Any tonearm set up for Lofgren A can be made to do Lofgren B but to do it accurately and consistently you need a protractor like the WallyTractor or the SmarTractor. You need a mirrored surface with lines finely etched and magnification.