Tonearm Parallel?

I assume that the angles mentionned with the cartridge instructions will be achieved when the tonearm is parallel. 
 

now every cartridge has a different height, mostly between 17 and 19 mm. As i swap cartridges regularly i would have to optimize with every swap. Which i am too lazy. 
 

I read values of 4 to 8 mm for the tonearm to be raised which sounds enormous. Other statements are ‚slightly, higher  at the bearing side. 
 

I will give it 2-3 mm.

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.

I play 4 catridges, depending on the music I listen. All different sound signatures and varying in height by 1 mm. Benz Gullwing, My Sonic Lab, Van den Hull and Goldring Ethos. 
 

adjusting each time would be a pain..