I’m sorry you felt my previous comment unconstructive buy you posts seem to based on a number of assumptions that I just don’t believe to be substantiated. Now I’m sure that the more expensive Lyra cartridge are hand tuned by one man, but every cartridge that Goldring rebuild is done by one man - in fact the same man each time as there is only one man in this department. In addition, he has been doing it for many, many years and has rewound hundreds (probably thousands) of coils. When I had Troika reworked by Goldring it came back with precisely the same output etc. Pretty much all the higher end cartridge manufacturers make use of a guru that no other can better......
Now cast back many years..... I have twice had people claim that during the repair of their television the tube (as it was then) had been replaced with a smaller one - not only would this have been physically impossible but, in neither case, had the tube been found faulty and it had not been replaced - however, even application of a tape measure did not fully convince them.....