Interesting link, interesting videos. So many variables to get the sound right from the cartridge through the tonearm and the phonopreamp….
I have a program to do adjust adjustment. Once it is set for with the bajonett headshell for the various cartridges its done. The VTA you would have to adjust everytime you change the cartridge. It will obviously also change with the tracking force you apply. That looks very time consuming considering each cartridge has different height which changes the vta again..
I guess getting the VTA horizontal with the highest cartridge and adjusting the tracking force of the individual carftidges will bring me close.
Otherwise i would have to stick to 1 cardtridge and optimize it.